Bug (only in my last commit) fixed under Windows. Removed some warnings in compilation

common/edaappl.cpp

@@ -449,7 +449,7 @@ bool WinEDA_App::SetBinDir()
     m_BinDir.Replace( WIN_STRING_DIR_SEP, UNIX_STRING_DIR_SEP );
 
     // Remove filename form command line:
-    while( m_BinDir.Last() != '/' )
+    while( m_BinDir.Last() != '/' && !m_BinDir.IsEmpty() )
         m_BinDir.RemoveLast();
 
     wxFileName pfn( wxT( "/posix/path/specification" ), wxT( "filename" ) );

common/zoom.cpp

@@ -51,8 +51,10 @@ void WinEDA_DrawFrame::PutOnGrid( wxPoint* coord )
 
     if( !GetBaseScreen()->m_UserGridIsON )
     {
-        coord->x = (int) round( ( coord->x / grid_size.x ) * grid_size.x );
-        coord->y = (int) round( ( coord->y / grid_size.y ) * grid_size.y );
+        coord->x = ( (int) round( coord->x /
+                                  grid_size.x ) ) * grid_size.x;
+        coord->y = ( (int) round( coord->y /
+                                  grid_size.y ) ) * grid_size.y;
     }
 }