Avoid trying to allocate zero bytes

Some allocators don't like it and others allocate space unnecessarily

Signed-off-by: Steve Bennett <steveb@workware.net.au>

1 files changed, 1 insertions, 1 deletions

diff --git a/jim.c b/jim.c
index fb05b6b..f8a806b 100644
--- a/jim.c
+++ b/jim.c
@@ -555,7 +555,7 @@ void JimPanicDump(int condition, const char *fmt, ...)
 
 void *Jim_Alloc(int size)
 {
-    return malloc(size);
+    return size ? malloc(size) : NULL;
 }
 
 void Jim_Free(void *ptr)