STR #1972 fix :check validity of icrsr before updating cursor state.

Fixes crashes when setting up Fl_Wizard pane dynamically before show() is called.


git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@6173 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

1 files changed, 5 insertions, 3 deletions

diff --git a/src/fl_cursor.cxx b/src/fl_cursor.cxx
index fb0d33b3e..6126ab3f3 100644
--- a/src/fl_cursor.cxx
+++ b/src/fl_cursor.cxx
@@ -230,9 +230,11 @@ void Fl_Window::cursor(Fl_Cursor c, Fl_Color, Fl_Color) {
   case FL_CURSOR_DEFAULT:
   default: break;
   }
-  SetCursor( *icrsr );
-  if (i) {
-    i->cursor = icrsr;
+  if (icrsr) { // make sure we have a non null icrsr before updating cursor state
+    SetCursor( *icrsr );
+    if (i) {
+      i->cursor = icrsr;
+    }
   }
 }