Mac OS: remove 5 compilation warnings of this kind:

warning: comparison of function 'CGDataConsumerCreateWithCFData' not equal to a null pointer is always true
note: prefix with the address-of operator to silence this warning



git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@10747 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

src/Fl_Copy_Surface.cxx

@@ -185,7 +185,7 @@ void Fl_Copy_Surface::init_PDF_context(int w, int h)
   pdfdata = CFDataCreateMutable(NULL, 0);
   CGDataConsumerRef myconsumer;
 #if MAC_OS_X_VERSION_MAX_ALLOWED >= 1040
-  if(CGDataConsumerCreateWithCFData != NULL) {
+  if (&CGDataConsumerCreateWithCFData != NULL) {
     myconsumer = CGDataConsumerCreateWithCFData(pdfdata); // 10.4
   }
   else 

src/Fl_Quartz_Printer.mm

@@ -240,7 +240,7 @@ typedef OSStatus (*PMSessionBeginDocumentNoDialog_type)(
 {	
   OSStatus status = PMSessionBeginPageNoDialog(printSession, pageFormat, NULL);
 #if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_4
-  if ( PMSessionGetCGGraphicsContext != NULL ) {
+  if ( &PMSessionGetCGGraphicsContext != NULL ) {
     status = PMSessionGetCGGraphicsContext(printSession, &fl_gc);
   }
   else

src/Fl_Window_shape.cxx

@@ -337,7 +337,7 @@ void Fl_Window::shape(const Fl_Image* img) {
 void Fl_Window::draw() {
   if (shape_data_) {
 # if defined(__APPLE__) && MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_4
-    if (shape_data_->mask && (CGContextClipToMask != NULL)) {
+    if (shape_data_->mask && (&CGContextClipToMask != NULL)) {
       CGContextClipToMask(fl_gc, CGRectMake(0,0,w(),h()), shape_data_->mask); // requires Mac OS 10.4
     }
     CGContextSaveGState(fl_gc);

src/Fl_get_key_mac.cxx

@@ -244,7 +244,7 @@ int Fl::event_key(int k) {
 //: returns true, if that key is pressed right now
 int Fl::get_key(int k) {
 #if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_4
-  if(CGEventSourceKeyState != NULL) {
+  if (&CGEventSourceKeyState != NULL) {
     return (int)CGEventSourceKeyState(kCGEventSourceStateCombinedSessionState, fltk2mac(k) );
     }
   else 

src/screen_xywh.cxx

@@ -131,7 +131,7 @@ static void screen_init() {
     screens[i].width  = int(r.size.width);
     screens[i].height = int(r.size.height);
 //fprintf(stderr,"screen %d %dx%dx%dx%d\n",i,screens[i].x,screens[i].y,screens[i].width,screens[i].height);
-    if (CGDisplayScreenSize != NULL) {
+    if (&CGDisplayScreenSize != NULL) {
       CGSize s = CGDisplayScreenSize(displays[i]); // from 10.3
       dpi_h[i] = screens[i].width / (s.width/25.4);
       dpi_v[i] = screens[i].height / (s.height/25.4);