Pcbnew: fix compil warning and a minor bug in plot negative (frame fer...

Pcbnew: fix  compil warning and a minor bug in plot negative (frame fer plotted in white therefore not visible).
minor code cleaning

pcbnew/CMakeLists.txt

@@ -189,7 +189,8 @@ set(PCBNEW_CLASS_SRCS
     pcbnew.cpp
     pcbnew_config.cpp
     pcbplot.cpp
-    plot_rtn.cpp
+    plot_board_layers.cpp
+    plot_brditems_plotter.cpp
     print_board_functions.cpp
     printout_controler.cpp
     ratsnest.cpp

pcbnew/pcb_plot_params.cpp

@@ -145,6 +145,10 @@ void PCB_PLOT_PARAMS::Format( OUTPUTFORMATTER* aFormatter,
                        m_useAuxOrigin ? trueStr : falseStr );
     aFormatter->Print( aNestLevel+1, "(%s %d)\n", getTokenName( T_hpglpennumber ),
                        m_HPGLPenNum );
+//  Obsolete parameter, pen speed is no more managed, because hpgl format
+// is now an export format, and for this, pen speed has no meaning
+//    aFormatter->Print( aNestLevel+1, "(%s %d)\n", getTokenName( T_hpglpenspeed ),
+//                       m_HPGLPenSpeed );
     aFormatter->Print( aNestLevel+1, "(%s %d)\n", getTokenName( T_hpglpenspeed ),
                        m_HPGLPenSpeed );
     aFormatter->Print( aNestLevel+1, "(%s %d)\n", getTokenName( T_hpglpendiameter ),

pcbnew/pcbplot.h

@@ -41,11 +41,13 @@ class BOARD;
 // Convert pcb dimension of 0.1 mil to PS units of inches.
 #define SCALE_PS    .0001
 
-// Convert dimension 0.1 mil -> HPGL units:
+// Convert dimension 0.1 mil -> HPGL units (1 HPGL unit = 25 micrometers):
 #define SCALE_HPGL  0.102041
 
-// Small drill marks diameter value (in 1/10000 inch)
-#define SMALL_DRILL 150
+// Small drill marks (small pad holes) diameter value
+#define SMALL_DRILL (int)( 0.35 * IU_PER_MM )
+
+
 // A helper class to plot board items
 class BRDITEMS_PLOTTER: public PCB_PLOT_PARAMS
 {

pcbnew/scripting/pcbnew_footprint_wizards.cpp

@@ -141,7 +141,7 @@ wxString PYTHON_FOOTPRINT_WIZARD::GetDescription()
 
 int PYTHON_FOOTPRINT_WIZARD::GetNumParameterPages()
 {
-    int ret;
+    int ret = 0;
     PyObject *result;
 
     /* Time to call the callback */