Make sure ot use the right enum name

Microsoft's garbage compiler just doesn't even..  read the names of
enums.  It sees an enum and goes "durr, that's an int" without even
properly evaluating it.  Just total garbage, as per usual.

libobs/obs-data.c

@@ -666,7 +666,7 @@ enum obs_data_type obs_data_item_gettype(obs_data_item_t item)
 	return item ? item->type : OBS_DATA_NULL;
 }
 
-enum obs_data_num_type obs_data_item_numtype(obs_data_item_t item)
+enum obs_data_number_type obs_data_item_numtype(obs_data_item_t item)
 {
 	struct obs_data_number *num;