Lots of clean-up in arb program parser.
Use new _mesa_init_fp/vp_instruction() function to initialize instructions.
diff --git a/src/mesa/shader/nvvertprog.h b/src/mesa/shader/nvvertprog.h
index b8dbe36..994a324 100644
--- a/src/mesa/shader/nvvertprog.h
+++ b/src/mesa/shader/nvvertprog.h
@@ -108,4 +108,8 @@
 };
 
 
+extern void
+_mesa_init_vp_instruction(struct vp_instruction *inst);
+
+
 #endif /* VERTPROG_H */