Make sure that functions added to gl_API.xml that do not have any GLX

section are marked as ignored.  Also ignore any functions that don't have
assigned dispatch offsets.

Fold Adam Jackson's changes to indirect_size.c into the generator scripts so
that they don't get lost.  "DO NOT EDIT" really means "DO NOT EDIT". ;)

src/mesa/glapi/glX_proto_send.py

@@ -789,6 +789,8 @@ class PrintGlxSizeStubs(glX_XML.GlxProto):
 		print '#include <GL/gl.h>'
 		print '#include "indirect_size.h"'
 		
+		print ''
+		glX_XML.printHaveAlias()
 		print ''
 		glX_XML.printPure()
 		print ''