Generate code using IsOk() instead of Ok() in stc.cpp.

Modify the script generating this file itself to produce IsOk() instead of
Ok(). This replaces the changes of r67681 which only modified the generated
file.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@68085 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/stc/gen_iface.py

@@ -194,9 +194,9 @@ methodOverrideMap = {
                 const wxColour& background) {
 
                 SendMsg(%s, markerNumber, markerSymbol);
-                if (foreground.Ok())
+                if (foreground.IsOk())
                     MarkerSetForeground(markerNumber, foreground);
-                if (background.Ok())
+                if (background.IsOk())
                     MarkerSetBackground(markerNumber, background);''',
 
      ('Set the symbol used for a particular marker number,',