fix breakage when ast_copy_string is used to copy substrings (bug #4146, but a different fix)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@5561 65c4cc65-6c06-0410-ace0-fbb531ad65f3

1 files changed, 3 insertions, 1 deletions

diff --git a/utils.c b/utils.c
index b73e4fcdb..e83d86fca 100755
--- a/utils.c
+++ b/utils.c
@@ -420,8 +420,10 @@ int ast_wait_for_input(int fd, int ms)
 
 void ast_copy_string(char *dst, const char *src, size_t size)
 {
-	while (*src && size--)
+	while (*src && size) {
 		*dst++ = *src++;
+		size--;
+	}
 	if (__builtin_expect(!size, 0))
 		dst--;
 	*dst = '\0';