Move comment before declarations and inline rcmp

Author: VanshAgarwal24036

Modules/itertoolsmodule.c

@@ -544,7 +544,6 @@ groupby_next(PyObject *op)
         else if (gbo->tgtkey == NULL)
             break;
         else {
-            int rcmp;
 
             /* A user-defined __eq__ can re-enter groupby and advance the iterator,
                mutating gbo->tgtkey / gbo->currkey while we are comparing them.
@@ -556,7 +555,7 @@ groupby_next(PyObject *op)
             Py_INCREF(tgtkey);
             Py_INCREF(currkey);
 
-            rcmp = PyObject_RichCompareBool(tgtkey, currkey, Py_EQ);
+            int rcmp = PyObject_RichCompareBool(tgtkey, currkey, Py_EQ);
 
             Py_DECREF(tgtkey);
             Py_DECREF(currkey);