Initialize ExpressionUnderCursor's _jumpedComma.

src/libs/cplusplus/ExpressionUnderCursor.cpp

@@ -38,6 +38,7 @@
 using namespace CPlusPlus;
 
 ExpressionUnderCursor::ExpressionUnderCursor()
+    : _jumpedComma(false)
 { }
 
 ExpressionUnderCursor::~ExpressionUnderCursor()

src/libs/cplusplus/ExpressionUnderCursor.h

@@ -59,6 +59,7 @@ private:
     int previousBlockState(const QTextBlock &block);
     bool isAccessToken(const SimpleToken &tk);
 
+private:
     bool _jumpedComma;
 };