libalpm: use null for no alpm_fileconflict_t->ctarget

lib/libalpm/conflict.c

@@ -269,7 +269,6 @@ static alpm_list_t *add_fileconflict(alpm_handle_t *handle,
 	STRDUP(conflict->file, filestr, goto error);
 	if(!pkg2) {
 		conflict->type = ALPM_FILECONFLICT_FILESYSTEM;
-		STRDUP(conflict->ctarget, "", goto error);
 	} else if(pkg2->origin == ALPM_PKG_FROM_LOCALDB) {
 		conflict->type = ALPM_FILECONFLICT_FILESYSTEM;
 		STRDUP(conflict->ctarget, pkg2->name, goto error);

src/pacman/sync.c

@@ -840,7 +840,7 @@ int sync_prepare_execute(void)
 									conflict->file, conflict->target, conflict->ctarget);
 							break;
 						case ALPM_FILECONFLICT_FILESYSTEM:
-							if(conflict->ctarget[0]) {
+							if(conflict->ctarget) {
 								printf(_("%s: %s exists in filesystem (owned by %s)\n"),
 										conflict->target, conflict->file, conflict->ctarget);
 							} else {