map type internal reorganization

src/types.cpp

@@ -684,7 +684,7 @@ gb_global Type *t_context_ptr                    = nullptr;
 gb_global Type *t_source_code_location           = nullptr;
 gb_global Type *t_source_code_location_ptr       = nullptr;
 
-gb_global Type *t_map_key                        = nullptr;
+gb_global Type *t_map_hash                       = nullptr;
 gb_global Type *t_map_header                     = nullptr;
 
 gb_global Type *t_vector_x86_mmx                 = nullptr;