update constantfunction loplugin

didn't find anything useful, so just updating the exclusion lists

Change-Id: I66d37aee185290f454e5ac0baeafd1f67bfaf106
Reviewed-on: https://gerrit.libreoffice.org/39254Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
Tested-by: Noel Grandin <noel.grandin@collabora.co.uk>

compilerplugins/clang/store/constantfunction.cxx

@@ -423,6 +423,30 @@ bool ConstantFunction::VisitFunctionDecl(const FunctionDecl * pFunctionDecl) {
     if (aFunctionName == "doc_getTileMode") {
         return true;
     }
+    // apparently this will be useful at sometime in the future
+    if (aFunctionName == "LocaleDataWrapper::getCurrZeroChar") {
+        return true;
+    }
+    // marked with TODO
+    if (aFunctionName == "oglcanvas::TextLayout::draw") {
+        return true;
+    }
+    // called from the .sdi files
+    if (aFunctionName == "SfxObjectShell::StateView_Impl") {
+        return true;
+    }
+    // gtk callback
+    if (aFunctionName == "GtkSalFrame::signalVisibility") {
+        return true;
+    }
+    // platform-version-dependent code
+    if (aFunctionName == "(anonymous namespace)::ACTIVE_TAB") {
+        return true;
+    }
+    // SMIL callbacks
+    if (aFunctionName == "boost::sp_scalar_constructor_hook" || aFunctionName == "boost::sp_scalar_destructor_hook") {
+        return true;
+    }