PATCH 03/17: computil: Check for NULL before passing to strlen

[Mikael Magnusson <mikachu@xxxxxxxxx>]

The rest of this function appears to be very careful about checking these,
then forgets in this one spot. Found by Coverity (Issue 1255805).
---
 Src/Zle/computil.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Src/Zle/computil.c b/Src/Zle/computil.c
index b11c39f..a81d1dd 100644
--- a/Src/Zle/computil.c
+++ b/Src/Zle/computil.c
@@ -4060,7 +4060,8 @@ cfp_test_exact(LinkList names, char **accept, char *skipped)
     if (sl > PATH_MAX2)
 	return NULL;
 
-    suf = dyncat(skipped, rembslash(dyncat(compprefix, compsuffix)));
+    suf = dyncat(skipped, rembslash(dyncat(compprefix ? compprefix : "",
+		                           compsuffix ? compsuffix : "")));
 
     for (node = firstnode(names); node; incnode(node)) {
 	l = strlen(p = (char *) getdata(node));
-- 
2.2.0.GIT