Add a string utility function "string_or_null" which can be used to

guarantee a non-null string value. Use it in the LDAP dissector. Fixes
the crash on Windows (and other platforms) reported in bug 3262.

svn path=/trunk/; revision=27478

1 files changed, 8 insertions, 0 deletions

diff --git a/epan/strutil.c b/epan/strutil.c
index f89e17a511..724d595314 100644
--- a/epan/strutil.c
+++ b/epan/strutil.c
@@ -951,3 +951,11 @@ epan_strcasestr(const char *haystack, const char *needle)
 	}
 	return NULL;
 }
+
+const char *
+string_or_null(const char *string)
+{
+  if (string)
+    return string;
+  return "[NULL]";
+}