patch 7.4.1208

Problem:    Using old style function declarations.
Solution:   Change to new style function declarations. (script by Hirohito
            Higashi)

src/if_python.c

@@ -861,7 +861,7 @@ Python_RestoreThread(void)
 #endif
 
     void
-python_end()
+python_end(void)
 {
     static int recurse = 0;
 
@@ -899,7 +899,7 @@ python_end()
 
 #if (defined(DYNAMIC_PYTHON) && defined(FEAT_PYTHON3)) || defined(PROTO)
     int
-python_loaded()
+python_loaded(void)
 {
     return (hinstPython != 0);
 }