Silence compiler warnings [-Wunused-but-set-variable]

png/pngread.c

@@ -3559,6 +3559,7 @@ png_image_read_background(png_voidp argument)
                      }
 
                      row += display->row_bytes;
+                     (void)row; // FLTK: silence warning: FIXME - remove variable 'row'?
                   }
                }
             }

src/Fl_Preferences.cxx

@@ -1427,6 +1427,7 @@ int Fl_Preferences::Node::write( FILE *f ) {
         fputc( '\n', f );
         src += cnt;
       }
+      (void)written; // silence warning
     }
     else
       fprintf( f, "%s\n", entry_[i].name );

src/Fl_cocoa.mm

@@ -1775,6 +1775,7 @@ void Fl_Cocoa_Screen_Driver::open_display_platform() {
       // We create a thread that does nothing so it completes very fast:
       [NSThread detachNewThreadSelector:@selector(doNothing:) toTarget:[FLWindowDelegate singleInstance] withObject:nil];
     }
+    (void)localPool; // silence warning
   }
 }
 
@@ -3021,8 +3022,6 @@ Fl_X* Fl_Cocoa_Window_Driver::makeWindow()
   }
   int xp = w->x();
   int yp = w->y();
-  int wp = w->w();
-  int hp = w->h();
 
   int xwm = xp, ywm = yp, bt, bx, by;
 
@@ -3040,10 +3039,6 @@ Fl_X* Fl_Cocoa_Window_Driver::makeWindow()
     winlevel = non_modal_window_level();
   }
 
-  if (by+bt) {
-    wp += 2*bx;
-    hp += 2*by+bt;
-  }
   if (force_position()) {
     if (!Fl::grab()) {
       xp = xwm; yp = ywm;

src/drivers/Quartz/Fl_Quartz_Graphics_Driver_color.cxx

@@ -33,7 +33,6 @@ extern unsigned fl_cmap[256]; // defined in fl_color.cxx
 
 void Fl_Quartz_Graphics_Driver::color(Fl_Color i) {
   Fl_Graphics_Driver::color(i);
-  int index;
   uchar r, g, b;
   if (i & 0xFFFFFF00) {
     // translate rgb colors into color index
@@ -42,7 +41,6 @@ void Fl_Quartz_Graphics_Driver::color(Fl_Color i) {
     b = i>> 8;
   } else {
     // translate index into rgb:
-    index = i;
     unsigned c = fl_cmap[i];
     r = c>>24;
     g = c>>16;