glsl: set the flags for ARB_geometry_shader4 when the EXT version is …

…used

Since there is no difference in functionality between GL_EXT_geometry_shader4
and GL_ARB_geometry_shader4, using one flag for both will simplify code that
needs to check whether one of the extensions is enabled.

src/glsl/glsl_parser_extras.cpp

@@ -425,6 +425,10 @@ _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
       const _mesa_glsl_extension *extension = find_extension(name);
       if (extension && extension->compatible_with_state(state)) {
          extension->set_flags(state, behavior);
+         if (strcmp(name, "GL_EXT_geometry_shader4") == 0) {
+            state->ARB_geometry_shader4_enable = state->EXT_geometry_shader4_enable;
+            state->ARB_geometry_shader4_warn = state->EXT_geometry_shader4_warn;
+         }
       } else {
          static const char *const fmt = "extension `%s' unsupported in %s shader";