add __isoc99_vfscanf weak alias to vfscanf

this glibc abi compatibility function was missed when the scanf
aliases were added.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/stdio/vfscanf.c b/src/stdio/vfscanf.c
index 0091a8d4..d4d2454b 100644
--- a/src/stdio/vfscanf.c
+++ b/src/stdio/vfscanf.c
@@ -328,3 +328,5 @@ match_fail:
 	FUNLOCK(f);
 	return matches;
 }
+
+weak_alias(vfscanf,__isoc99_vfscanf);