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-rw-r--r--src/alloc.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/alloc.c b/src/alloc.c
index 031cb99b674..797b385fbd2 100644
--- a/src/alloc.c
+++ b/src/alloc.c
@@ -797,6 +797,8 @@ void
xfree (block)
POINTER_TYPE *block;
{
+ if (!block)
+ return;
MALLOC_BLOCK_INPUT;
free (block);
MALLOC_UNBLOCK_INPUT;