return NULL for a zero size memdup

diff --git a/source/lib/util.c b/source/lib/util.c
index 2f8b52ccbde28eda156ddf124ddfac3ccb26ec45..ccdfc72bbdd6dcd71617d8f44814452360105582 100644 (file)
--- a/source/lib/util.c
+++ b/source/lib/util.c
@@ -2581,6 +2581,7 @@ like strdup but for memory
 void *memdup(void *p, size_t size)
 {
        void *p2;
+       if (size == 0) return NULL;
        p2 = malloc(size);
        if (!p2) return NULL;
        memcpy(p2, p, size);