[PATCH] Make OpenGL constants pickleable

Makes it possible to store pickled renderable objects that have e.g.
GL_TRIANGLES as part of their state.

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--- PyOpenGL-3.0.0a6.orig/OpenGL/constant.py	2006-12-17 08:27:29.000000000 +1100
+++ PyOpenGL-3.0.0a6/OpenGL/constant.py	2007-10-06 03:09:22.000000000 +1000
@@ -33,8 +33,16 @@
 class IntConstant( Constant, int ):
 	"""Integer constant sub-class"""
 	__slots__ = ('name',)
+	def __getstate__(self):
+		return self.name
+	def __setstate__(self, st):
+		self.name = st
 class FloatConstant( Constant, float ):
 	"""Float constant sub-class"""
 	__slots__ = ('name',)
+	def __getstate__(self):
+		return self.name
+	def __setstate__(self, st):
+		self.name = st
 class StringConstant( Constant, str ):
 	"""Float constant sub-class"""