Tokenizer::simplifyDoWhileAddBraces(): change return type to void.

No functional change.

src/tokenize.cpp

@@ -1877,10 +1877,8 @@ void Tokenizer::simplifyIfAddBraces()
     }
 }
 
-bool Tokenizer::simplifyDoWhileAddBraces()
+void Tokenizer::simplifyDoWhileAddBraces()
 {
-    bool ret = false;
-
     for (Token *tok = _tokens; tok; tok = (tok ? tok->next() : NULL))
     {
         if (! Token::Match(tok, "do !!{"))
@@ -1913,12 +1911,8 @@ bool Tokenizer::simplifyDoWhileAddBraces()
             tok2->previous()->insertToken("}");
 
             Token::createMutualLinks(tok1->next(), tok2->previous());
-
-            ret = true;
         }
     }
-
-    return ret;
 }
 
 bool Tokenizer::simplifyConditionOperator()

src/tokenize.h

@@ -174,11 +174,10 @@ private:
      */
     void simplifyIfAddBraces();
 
-    /** Add braces to an do-while block
-     * @return true if something is modified
-     *         false if nothing is done.
+    /**
+     * Add braces to an do-while block
      */
-    bool simplifyDoWhileAddBraces();
+    void simplifyDoWhileAddBraces();
 
     /**
      * Simplify casts