xbps_repository_pool_init: do not fail to internalize all repos when the first one fails.

If the first registered repo couldn't be internalized, all other repositories
were also failing because it returned error, so simply skip them and return
error when all them cannot be internalized.

lib/repository_pool.c

@@ -143,13 +143,14 @@ xbps_repository_pool_init(void)
 			free(rpool->rpi);
 			free(rpool);
 			free(plist);
-			rv = errno;
 			if (errno == ENOENT) {
+				errno = 0;
 				nmissing++;
 				continue;
 			}
+			rv = errno;
 			xbps_dbg_printf("%s: cannot internalize plist %s: %s\n",
-			    __func__, plist, strerror(errno));
+			    __func__, plist, strerror(rv));
 			goto out;
 		}
 		free(plist);