Get rid of some warnings on Mac

Mac/Modules/carbonevt/_CarbonEvtmodule.c

@@ -40,7 +40,7 @@ EventTypeSpec_Convert(PyObject *v, EventTypeSpec *out)
                         PyMac_GetOSType, &(out->eventClass),
                         &(out->eventKind)))
                 return 1;
-        return NULL;
+        return 0;
 }
 
 /********** end EventTypeSpec *******/
@@ -78,7 +78,7 @@ EventHotKeyID_Convert(PyObject *v, EventHotKeyID *out)
 {
         if (PyArg_ParseTuple(v, "ll", &out->signature, &out->id))
                 return 1;
-        return NULL;
+        return 0;
 }
 
 /********** end EventHotKeyID *******/

Mac/Modules/qd/_Qdmodule.c

@@ -5824,7 +5824,6 @@ static PyObject *Qd_MacDrawText(PyObject *_self, PyObject *_args)
 {
 	PyObject *_res = NULL;
 	char *textBuf__in__;
-	int textBuf__len__;
 	int textBuf__in_len__;
 	short firstByte;
 	short byteCount;
@@ -5885,7 +5884,6 @@ static PyObject *Qd_TextWidth(PyObject *_self, PyObject *_args)
 	PyObject *_res = NULL;
 	short _rv;
 	char *textBuf__in__;
-	int textBuf__len__;
 	int textBuf__in_len__;
 	short firstByte;
 	short byteCount;
@@ -6471,7 +6469,6 @@ static PyObject *Qd_DrawText(PyObject *_self, PyObject *_args)
 {
 	PyObject *_res = NULL;
 	char *textBuf__in__;
-	int textBuf__len__;
 	int textBuf__in_len__;
 	short firstByte;
 	short byteCount;
@@ -6534,7 +6531,7 @@ static PyObject *Qd_RawBitMap(PyObject *_self, PyObject *_args)
 	        return NULL;
 	if ( PyString_Size(source) != sizeof(BitMap) && PyString_Size(source) != sizeof(PixMap) ) {
 	        PyErr_Format(PyExc_TypeError,
-	                "Argument size was %d, should be %d (sizeof BitMap) or %d (sizeof PixMap)",
+	                "Argument size was %ld, should be %lu (sizeof BitMap) or %lu (sizeof PixMap)",
 	                PyString_Size(source), sizeof(BitMap), sizeof(PixMap));
 	        return NULL;
 	}