CMake: Force a cmake run if no data is available yet

It makes no sense to not parse if we never parsed before. This got
broken when I tried to reduce the number of cmake runs.

Change-Id: Id70a6550faf248cc983b61f6d2456a93d8454a50
Task-number: QTCREATORBUG-15927
Reviewed-by: Tim Jenssen <tim.jenssen@theqtcompany.com>

src/plugins/cmakeprojectmanager/builddirmanager.cpp

@@ -607,8 +607,10 @@ void BuildDirManager::maybeForceReparse()
     const QByteArray EXTRA_GENERATOR_KEY = "CMAKE_EXTRA_GENERATOR";
     const QByteArray CMAKE_COMMAND_KEY = "CMAKE_COMMAND";
 
-    if (!m_hasData)
+    if (!m_hasData) {
+        forceReparse();
         return;
+    }
 
     const CMakeConfig currentConfig = parsedConfiguration();