r. 8537 had by error introduced a compilation error with ppc architecture.

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@8573 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

src/gl_draw.cxx

@@ -567,9 +567,11 @@ void gl_texture_pile_height(int max) {}
 #if defined(__APPLE__)
 void gl_texture_reset()
 {
+#if GL_DRAW_USES_TEXTURES
   if (gl_fifo) gl_texture_pile_height(gl_texture_pile_height());
+#endif // GL_DRAW_USES_TEXTURES
 }
-#endif
+#endif // __APPLE__
 
 #endif // HAVE_GL