roken: fix strtoll

b10ad7eb57
("roken: strtoll.c negation is a no-op on unsigned integer")
broke strtoll() by failing to assign 'ret' in the success case.

Change-Id: I30535d83a2bef305140f1a6bd1ed2eeba23db9b9

lib/roken/strtoll.c

@@ -141,8 +141,11 @@ strtoll(const char * nptr, char ** endptr, int base)
     } else if (!any) {
 noconv:
 	errno = EINVAL;
-    } else if (neg)
+    } else if (neg) {
 	ret = -(long long)acc;
+    } else {
+	ret = acc;
+    }
     if (endptr != NULL)
 	*endptr = (char *)(any ? s - 1 : nptr);
     return ret;