DeclBase::getLocation() gives better location than getLocStart()

It usually points to the declaration name rather than its start.

Change-Id: Idcb068ed88a783c177ae9dc255595afa0a163a7e

compilerplugins/clang/compileplugin.hxx

@@ -33,7 +33,7 @@ class Plugin
 inline
 bool Plugin::ignoreLocation( const Decl* decl )
     {
-    return ignoreLocation( decl->getLocStart());
+    return ignoreLocation( decl->getLocation());
     }
 
 inline

compilerplugins/clang/unusedvariablecheck.cxx

@@ -87,11 +87,11 @@ bool UnusedVariableCheck::VisitNamedDecl( NamedDecl* declaration )
                     if( !func->doesThisDeclarationHaveABody())
                         return true;
                 report( DiagnosticsEngine::Warning, "unused parameter %0 [loplugin]",
-                    var->getLocStart()) << var->getDeclName();
+                    var->getLocation()) << var->getDeclName();
                 }
             else
                 report( DiagnosticsEngine::Warning, "unused variable %0 [loplugin]",
-                    var->getLocStart()) << var->getDeclName();
+                    var->getLocation()) << var->getDeclName();
             }
         }
     return true;