New QTC_CHECK warning replacing QTC_ASSERT(x, /**/)

Warn if the condition fails, but otherwise don't change the execution
flow.

Change-Id: Id7b14c745109b66960add967b2a4ef8d31e1a546
Reviewed-on: http://codereview.qt.nokia.com/2389
Reviewed-by: Eike Ziller <eike.ziller@nokia.com>

src/plugins/cvs/cvseditor.cpp

@@ -127,7 +127,7 @@ cvs diff -d -u -r1.1 -r1.2:
 VCSBase::DiffHighlighter *CVSEditor::createDiffHighlighter() const
 {
     const QRegExp filePattern(QLatin1String("^[-+][-+][-+] .*1\\.[\\d\\.]+$"));
-    QTC_ASSERT(filePattern.isValid(), /**/);
+    QTC_CHECK(filePattern.isValid());
     return new VCSBase::DiffHighlighter(filePattern);
 }