Fix warnings in release mode (unused variables)

qmljsimportdependencies.cpp:937:18: warning: variable ‘found’ set but not used [-Wunused-but-set-variable]
findtoolbar.cpp:665:18: warning: unused variable ‘w’ [-Wunused-variable]

Change-Id: I75930fa6f5a7cbb91d9c39e6808f8c3ce913327e
Reviewed-by: Eike Ziller <eike.ziller@digia.com>

src/libs/qmljs/qmljsimportdependencies.cpp

@@ -938,7 +938,7 @@ void ImportDependencies::checkConsistency() const
             foreach (const Export &e, m_coreImports.value(s).possibleExports)
                 if (e.exportName == j.key())
                     found = true;
-            Q_ASSERT(found);
+            Q_ASSERT(found); Q_UNUSED(found);
         }
     }
     QMapIterator<QString,CoreImport> i(m_coreImports);