Bug 719639 - @xrefitem with empty heading string

Replaced:
  if (!(x->title().length())) return;
by:
  if (x->title().isEmpty()) return;

src/docbookvisitor.cpp

@@ -1160,7 +1160,7 @@ void DocbookDocVisitor::visitPost(DocParamList *)
 void DocbookDocVisitor::visitPre(DocXRefItem *x)
 {
   if (m_hide) return;
-  if (!(x->title().length())) return;
+  if (x->title().isEmpty()) return;
   m_t << "<para><link linkend=\"";
   m_t << x->file() << "_1" << x->anchor();
   m_t << "\">";
@@ -1172,7 +1172,7 @@ void DocbookDocVisitor::visitPre(DocXRefItem *x)
 void DocbookDocVisitor::visitPost(DocXRefItem *x)
 {
   if (m_hide) return;
-  if (!(x->title().length())) return;
+  if (x->title().isEmpty()) return;
   m_t << "</para>";
 }
 

src/htmldocvisitor.cpp

@@ -1777,7 +1777,7 @@ void HtmlDocVisitor::visitPost(DocParamList *)
 void HtmlDocVisitor::visitPre(DocXRefItem *x)
 {
   if (m_hide) return;
-  if (!(x->title().length())) return;
+  if (x->title().isEmpty()) return;
 
   forceEndParagraph(x);
   bool anonymousEnum = x->file()=="@";
@@ -1800,7 +1800,7 @@ void HtmlDocVisitor::visitPre(DocXRefItem *x)
 void HtmlDocVisitor::visitPost(DocXRefItem *x)
 {
   if (m_hide) return;
-  if (!(x->title().length())) return;
+  if (x->title().isEmpty()) return;
   m_t << "</dd></dl>" << endl;
   forceStartParagraph(x);
 }

src/latexdocvisitor.cpp

@@ -1515,7 +1515,7 @@ void LatexDocVisitor::visitPost(DocParamList *pl)
 void LatexDocVisitor::visitPre(DocXRefItem *x)
 {
   if (m_hide) return;
-  if (!(x->title().length())) return;
+  if (x->title().isEmpty()) return;
   m_t << "\\begin{DoxyRefDesc}{";
   filter(x->title());
   m_t << "}" << endl;
@@ -1538,7 +1538,7 @@ void LatexDocVisitor::visitPre(DocXRefItem *x)
 void LatexDocVisitor::visitPost(DocXRefItem *x)
 {
   if (m_hide) return;
-  if (!(x->title().length())) return;
+  if (x->title().isEmpty()) return;
   m_t << "\\end{DoxyRefDesc}" << endl;
 }
 

src/mandocvisitor.cpp

@@ -933,7 +933,7 @@ void ManDocVisitor::visitPost(DocParamList *pl)
 void ManDocVisitor::visitPre(DocXRefItem *x)
 {
   if (m_hide) return;
-  if (!(x->title().length())) return;
+  if (x->title().isEmpty()) return;
   if (!m_firstCol)
   { 
     m_t << endl;
@@ -948,7 +948,7 @@ void ManDocVisitor::visitPre(DocXRefItem *x)
 void ManDocVisitor::visitPost(DocXRefItem *x)
 {
   if (m_hide) return;
-  if (!(x->title().length())) return;
+  if (x->title().isEmpty()) return;
   if (!m_firstCol) m_t << endl;
   m_t << ".RE" << endl;
   m_t << ".PP" << endl;

src/perlmodgen.cpp

@@ -1360,14 +1360,14 @@ void PerlModDocVisitor::visitPre(DocXRefItem *x)
   m_output.add("</xreftitle>");
   m_output.add("<xrefdescription>");
 #endif
-  if (!(x->title().length())) return;
+  if (x->title().isEmpty()) return;
   openItem("xrefitem");
   openSubBlock("content");
 }
 
 void PerlModDocVisitor::visitPost(DocXRefItem *x)
 {
-  if (!(x->title().length())) return;
+  if (x->title().isEmpty()) return;
   closeSubBlock();
   closeItem();
 #if 0

src/rtfdocvisitor.cpp

@@ -1579,7 +1579,7 @@ void RTFDocVisitor::visitPost(DocParamList *pl)
 void RTFDocVisitor::visitPre(DocXRefItem *x)
 {
   if (m_hide) return;
-  if (!(x->title().length())) return;
+  if (x->title().isEmpty()) return;
   bool anonymousEnum = x->file()=="@";
   DBG_RTF("{\\comment RTFDocVisitor::visitPre(DocXRefItem)}\n");
   m_t << "{"; // start param list
@@ -1628,7 +1628,7 @@ void RTFDocVisitor::visitPre(DocXRefItem *x)
 void RTFDocVisitor::visitPost(DocXRefItem *x)
 {
   if (m_hide) return;
-  if (!(x->title().length())) return;
+  if (x->title().isEmpty()) return;
   DBG_RTF("{\\comment RTFDocVisitor::visitPost(DocXRefItem)}\n");
   m_t << "\\par" << endl;
   decIndentLevel();

src/xmldocvisitor.cpp

@@ -1012,7 +1012,7 @@ void XmlDocVisitor::visitPost(DocParamList *)
 void XmlDocVisitor::visitPre(DocXRefItem *x)
 {
   if (m_hide) return;
-  if (!(x->title().length())) return;
+  if (x->title().isEmpty()) return;
   m_t << "<xrefsect id=\"";
   m_t << x->file() << "_1" << x->anchor();
   m_t << "\">";
@@ -1025,7 +1025,7 @@ void XmlDocVisitor::visitPre(DocXRefItem *x)
 void XmlDocVisitor::visitPost(DocXRefItem *x)
 {
   if (m_hide) return;
-  if (!(x->title().length())) return;
+  if (x->title().isEmpty()) return;
   m_t << "</xrefdescription>";
   m_t << "</xrefsect>";
 }