CppTools: Fix nextToSurroundingDefinitions

Now it is checked if the adjacent declaration is also defined and one
can define the destination file.

Change-Id: Ifff59c49fc2ab3e2f36f41df42ae4b7d7ff8dd35
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>

src/plugins/cpptools/insertionpointlocator.h

@@ -99,7 +99,8 @@ public:
                                                AccessSpec xsSpec) const;
 
     QList<InsertionLocation> methodDefinition(CPlusPlus::Symbol *declaration,
-                                              bool useSymbolFinder = true) const;
+                                              bool useSymbolFinder = true,
+                                              const QString &destinationFile = QString()) const;
 
 private:
     CppRefactoringChanges m_refactoringChanges;