MINOR: lua: move common function
This patch moves the function hlua_checkudata which check that
an object contains the expected class_reference as metatable.
This function is commonly used by all the lua functions.
The function hlua_metatype is also moved.
diff --git a/include/proto/hlua_fcn.h b/include/proto/hlua_fcn.h
index 37d07ff..179d40c 100644
--- a/include/proto/hlua_fcn.h
+++ b/include/proto/hlua_fcn.h
@@ -1,6 +1,7 @@
#ifndef _PROTO_HLUA_FCN_H
#define _PROTO_HLUA_FCN_H
+void *hlua_checkudata(lua_State *L, int ud, int class_ref);
int hlua_fcn_reg_core_fcn(lua_State *L);
#endif /* _PROTO_HLUA_FCN_H */