C++: Only reindent on electric characters if indent wasn't user-changed.

This should make the indenter less strict and annoying for non-standard
indentation styles.

Reviewed-by: Roberto Raggi

src/plugins/cpptools/cppcodeformatter.cpp

@@ -470,6 +470,12 @@ int CodeFormatter::indentFor(const QTextBlock &block)
     return m_indentDepth;
 }
 
+int CodeFormatter::indentForNewLineAfter(const QTextBlock &block)
+{
+    restoreCurrentState(block);
+    return m_indentDepth;
+}
+
 void CodeFormatter::updateStateUntil(const QTextBlock &endBlock)
 {
     QStack<State> previousState = initialState();

src/plugins/cpptools/cppcodeformatter.h

@@ -69,6 +69,7 @@ public:
     void updateLineStateChange(const QTextBlock &block);
 
     int indentFor(const QTextBlock &block);
+    int indentForNewLineAfter(const QTextBlock &block);
 
     void setTabSize(int tabSize);