C++: fix typo

Change-Id: I57394be40b85eb907d9c7d0ebb713685f9651a4d
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>

src/libs/cplusplus/ASTParent.h

@@ -40,7 +40,7 @@ namespace CPlusPlus {
 class CPLUSPLUS_EXPORT ASTParent: protected ASTVisitor
 {
 public:
-    ASTParent(TranslationUnit *transaltionUnit, AST *rootNode);
+    ASTParent(TranslationUnit *translationUnit, AST *rootNode);
     virtual ~ASTParent();
 
     AST *operator()(AST *ast) const;