loplugin:constparam in sc part8

Change-Id: I6cf9c5e662b20de9c9698a8c1fab56a09950c522
Reviewed-on: https://gerrit.libreoffice.org/41683
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

compilerplugins/clang/constparams.cxx

@@ -420,6 +420,8 @@ bool ConstParams::checkIfCanBeConst(const Stmt* stmt, const ParmVarDecl* parmVar
         return true;
     } else if (isa<SwitchStmt>(parent)) {
         return true;
+    } else if (isa<DoStmt>(parent)) {
+        return true;
     } else if (isa<CXXDeleteExpr>(parent)) {
         return false;
     } else if (isa<VAArgExpr>(parent)) {