glX_proto_send.py: Unify the style of function pointer calls in structs

Signed-off-by: Boyan Ding <boyan.j.ding@gmail.com>
diff --git a/src/mapi/glapi/gen/glX_proto_send.py b/src/mapi/glapi/gen/glX_proto_send.py
index 26e7ab6..b534cd4 100644
--- a/src/mapi/glapi/gen/glX_proto_send.py
+++ b/src/mapi/glapi/gen/glX_proto_send.py
@@ -573,7 +573,7 @@
                         condition = 'compsize > 0'
 
                     print 'if (%s) {' % (condition)
-                    print '    (*gc->fillImage)(gc, %s, %s, %s, %s, %s, %s, %s, %s, %s);' % (dim_str, width, height, depth, param.img_format, param.img_type, param.name, pcPtr, pixHeaderPtr)
+                    print '    gc->fillImage(gc, %s, %s, %s, %s, %s, %s, %s, %s, %s);' % (dim_str, width, height, depth, param.img_format, param.img_type, param.name, pcPtr, pixHeaderPtr)
                     print '} else {'
                     print '    (void) memcpy( %s, default_pixel_store_%uD, default_pixel_store_%uD_size );' % (pixHeaderPtr, dim, dim)
                     print '}'