CMake: Fix crash in makestep if used in the deploystep list

Task-number: QTCREATORBUG-7427
Change-Id: I8cc1e49e87d38c1a789bf3dee25b62668efc433d
Reviewed-by: Tobias Hunger <tobias.hunger@nokia.com>

src/plugins/cmakeprojectmanager/makestep.cpp

@@ -132,6 +132,8 @@ bool MakeStep::fromMap(const QVariantMap &map)
 bool MakeStep::init()
 {
     CMakeBuildConfiguration *bc = cmakeBuildConfiguration();
+    if (!bc)
+        bc = static_cast<CMakeBuildConfiguration *>(target()->activeBuildConfiguration());
 
     QString arguments = Utils::QtcProcess::joinArgs(m_buildTargets);
     Utils::QtcProcess::addArgs(&arguments, additionalArguments());