Update checkbufferoverrun.cpp

Author: chrchr-github

lib/checkbufferoverrun.cpp

@@ -556,17 +556,17 @@ ValueFlow::Value CheckBufferOverrunImpl::getBufferSize(const Token *bufTok) cons
 {
     if (!bufTok->valueType())
         return ValueFlow::Value(-1);
-    const Token* varTok = bufTok;
+
     if (bufTok->isUnaryOp("&")) {
         bufTok = bufTok->astOperand1();
         if (Token::simpleMatch(bufTok, "[")) {
             const Token* index = bufTok->astOperand2();
             if (!(index && index->hasKnownIntValue() && index->getKnownIntValue() == 0))
                 return ValueFlow::Value(-1);
-            varTok = bufTok->astOperand1();
+            bufTok = bufTok->astOperand1();
         }
     }
-    const Variable *var = varTok->variable();
+    const Variable *var = bufTok->variable();
 
     if (!var || var->dimensions().empty()) {
         const ValueFlow::Value *value = getBufferSizeValue(bufTok);