Fix potential crash when no target name is present

Signed-off-by: Simo Sorce <[email protected]>

Author: simo5

src/ntlm.c

@@ -325,7 +325,9 @@ static int ntlm_decode_u16l_str_hdr(struct ntlm_ctx *ctx,
         safefree(out);
     } else {
         /* make sure to terminate output string */
-        out[outlen] = '\0';
+        if (out) {
+            out[outlen] = '\0';
+        }
     }
 
     *str = out;