readlink: fallback to real_readlink if linker is null

libgcompat/readlink.c

@@ -31,7 +31,7 @@ ssize_t readlink(const char *path, char *buf, size_t len)
 			if (linker == NULL) {
 				linker = realpath(LINKER, NULL);
 				if (linker == NULL) {
-					return -1;
+					return real_readlink(path, buf, len);
 				}
 			}
 			if (real_readlink(path, exe, sizeof(exe)) < 1) {