MERGE_TYPE_UNKNOWN
pc->merge_type = MERGE_TYPE_UNKNOWN;
pc->merge_type = MERGE_TYPE_UNKNOWN;
pc->merge_type = MERGE_TYPE_UNKNOWN;
pc->merge_type = MERGE_TYPE_UNKNOWN;
pc->merge_type = MERGE_TYPE_UNKNOWN;
pc->merge_type = MERGE_TYPE_UNKNOWN;
pc->merge_type = MERGE_TYPE_UNKNOWN;