Clang: Fix some issues with running indexer over Qt Creator

- fix qDebug channels on Windows
 - fix the number of perameters in the sql statement
 - fix nullptr access
 - speed up preprocessor a little bit

Change-Id: Ic9b32fbcc6b409c4064c4f522b94391cbff8654e
Reviewed-by: Marco Bubke <marco.bubke@qt.io>

src/tools/clangrefactoringbackend/source/clangtool.h

@@ -95,8 +95,6 @@ public:
 
     bool isClean() const;
 
-
-
 private:
     RefactoringCompilationDatabase m_compilationDatabase;
     std::vector<FileContent> m_fileContents;

src/tools/clangrefactoringbackend/source/symbolstorage.h

@@ -341,12 +341,14 @@ public:
         m_database};
     mutable ReadStatement m_getProjectPartArtefactsBySourceId{
         "SELECT toolChainArguments, compilerMacros, systemIncludeSearchPaths, "
-        "projectIncludeSearchPaths, projectPartId FROM projectParts WHERE projectPartId = (SELECT "
+        "projectIncludeSearchPaths, projectPartId, language, languageVersion, languageExtension "
+        "FROM projectParts WHERE projectPartId = (SELECT "
         "projectPartId FROM projectPartsSources WHERE sourceId = ?)",
         m_database};
     mutable ReadStatement m_getProjectPartArtefactsByProjectPartName{
         "SELECT toolChainArguments, compilerMacros, systemIncludeSearchPaths, "
-        "projectIncludeSearchPaths, projectPartId FROM projectParts WHERE projectPartName = ?",
+        "projectIncludeSearchPaths, projectPartId, language, languageVersion, languageExtension "
+        "FROM projectParts WHERE projectPartName = ?",
         m_database};
     mutable ReadStatement m_getPrecompiledHeader{
         "SELECT projectPchPath, projectPchBuildTime FROM precompiledHeaders WHERE projectPartId = ?",

src/tools/clangrefactoringbackend/source/symbolsvisitorbase.h

@@ -68,7 +68,8 @@ public:
     bool isAlreadyParsed(clang::FileID fileId)
     {
         const clang::FileEntry *fileEntry = m_sourceManager->getFileEntryForID(fileId);
-
+        if (!fileEntry)
+            return false;
         return m_sourcesManager.alreadyParsed(filePathId(fileEntry),
                                               fileEntry->getModificationTime());
     }