Merge pull request #1439 An error occurred from nicolasnoble/python-c89

C89-ify the python code.

src/python/src/grpc/_adapter/_completion_queue.c

@@ -354,6 +354,8 @@ static PyObject *pygrpc_completion_queue_get(CompletionQueue *self,
   PyObject *event_args;
   PyObject *event;
 
+  pygrpc_tag *tag;
+
   if (!(PyArg_ParseTuple(args, "O:get", &deadline))) {
     return NULL;
   }
@@ -380,7 +382,7 @@ static PyObject *pygrpc_completion_queue_get(CompletionQueue *self,
     Py_RETURN_NONE;
   }
 
-  pygrpc_tag *tag = (pygrpc_tag *)c_event->tag;
+  tag = (pygrpc_tag *)c_event->tag;
 
   switch (c_event->type) {
     case GRPC_QUEUE_SHUTDOWN:

src/python/src/grpc/_adapter/_tag.h

@@ -51,7 +51,7 @@ typedef enum {
   PYGRPC_FINISH_ACCEPTED      = 4,
   PYGRPC_CLIENT_METADATA_READ = 5,
   PYGRPC_FINISHED_CLIENT      = 6,
-  PYGRPC_FINISHED_SERVER      = 7,
+  PYGRPC_FINISHED_SERVER      = 7
 } pygrpc_tag_type;
 
 typedef struct {