clang warnings

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@66784 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/osx/cocoa/glcanvas.mm

@@ -187,7 +187,7 @@ WXGLPixelFormat WXGLChoosePixelFormat(const int *attribList)
                         if ( !attribList[arg++] )
                             break;
 
-                        return false;
+                        return nil;
                     }
 
                     data[p++] = NSOpenGLPFASampleBuffers;
@@ -204,7 +204,7 @@ WXGLPixelFormat WXGLChoosePixelFormat(const int *attribList)
                         if ( !attribList[arg++] )
                             break;
 
-                        return false;
+                        return nil;
                     }
 
                     data[p++] = NSOpenGLPFASamples;

src/richtext/richtextbuffer.cpp

@@ -8914,7 +8914,7 @@ wxRichTextCell* wxRichTextTable::GetCell(int row, int col) const
         return wxDynamicCast(obj, wxRichTextCell);
     }
     else
-        return false;
+        return NULL;
 }
 
 // Returns a selection object specifying the selections between start and end character positions.