C++ indenter: Fix preserving indent in comments with tabs.

Task-number: QTCREATORBUG-6151
Change-Id: I584666441dce05af9a91cd28812b230c36bdd830
Reviewed-on: http://codereview.qt-project.org/5318

Reviewed-by: Christian Kamm <christian.d.kamm@nokia.com>

src/plugins/cpptools/cppcodeformatter.cpp

@@ -1342,7 +1342,7 @@ void QtStyleCodeFormatter::adjustIndent(const QList<CPlusPlus::Token> &tokens, i
     if (topState.type == multiline_comment_start
             || topState.type == multiline_comment_cont) {
         if (!tokens.isEmpty()) {
-            *indentDepth = tokens.at(0).begin();
+            *indentDepth = column(tokens.at(0).begin());
             return;
         }
     }