Replaced Ok() occurrences with IsOk() throughout trunk.

Additionally renamed wxOSX' private wxNativePrinterDC::Ok() function to IsOk().

Didn't deprecate the various Ok() functions: given the amount of changes already introduced in 3.0 a trivial one like this seems more suitable for after 3.0.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@67681 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/imagpng.cpp

@@ -558,7 +558,7 @@ wxPNGHandler::LoadFile(wxImage *image,
 
     image->Create((int)width, (int)height, (bool) false /* no need to init pixels */);
 
-    if (!image->Ok())
+    if (!image->IsOk())
         goto error;
 
     // initialize all line pointers to NULL to ensure that they can be safely
@@ -660,7 +660,7 @@ error:
        wxLogError(_("Couldn't load a PNG image - file is corrupted or not enough memory."));
     }
 
-    if ( image->Ok() )
+    if ( image->IsOk() )
     {
         image->Destroy();
     }