Fix the commit 6838 (Fix non optimal position of net name and pad name in GAL mode), broken.

common/gal/opengl/opengl_gal.cpp

@@ -146,9 +146,10 @@ OPENGL_GAL::~OPENGL_GAL()
             glDeleteTextures( 1, &fontTexture );
             isBitmapFontLoaded = false;
         }
-
+#ifndef __WIN32__   // FIXME: crashes on W7 - 32 bits
         delete OPENGL_GAL::glContext;
         glContext = NULL;
+#endif
     }
 }