From 4601e40615090f14e527738efcc7912e42cdc327 Mon Sep 17 00:00:00 2001
From: Dmitry-Me <wipedout@yandex.ru>
Date: Mon, 2 Oct 2017 18:03:55 +0300
Subject: [PATCH] Simplify code for finding string format token

---
 lib/checkio.cpp | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/lib/checkio.cpp b/lib/checkio.cpp
index 9537a32cc..a67cc4e0a 100644
--- a/lib/checkio.cpp
+++ b/lib/checkio.cpp
@@ -480,8 +480,12 @@ static bool findFormat(unsigned int arg, const Token *firstArg,
                  argTok->variable()->dimensionKnown(0) &&
                  argTok->variable()->dimension(0) != 0))) {
         *formatArgTok = argTok->nextArgument();
-        if (!argTok->values().empty() && argTok->values().front().isTokValue() && argTok->values().front().tokvalue && argTok->values().front().tokvalue->tokType() == Token::eString)
-            *formatStringTok = argTok->values().front().tokvalue;
+        if (!argTok->values().empty()) {
+            const ValueFlow::Value &value = argTok->values().front();
+            if (value.isTokValue() && value.tokvalue && value.tokvalue->tokType() == Token::eString) {
+                *formatStringTok = value.tokvalue;
+            }
+        }
         return true;
     }
     return false;