Fix compilation of test when PythonQt_Wrap_Qtcore option is disabled

This commit fixes the following link error:

PythonQtTestMain.cpp:(.text+0x1637): undefined reference to `PythonQtTestCleanup::~PythonQtTestCleanup()'

CMakeLists.txt

@@ -270,6 +270,8 @@ if(BUILD_TESTING)
     tests/PythonQtTestMain.cpp
     )
 
+  set_property(SOURCE tests/PythonQtTestMain.cpp PROPERTY COMPILE_DEFINITIONS "main=tests_PythonQtTestMain")
+
   list(APPEND test_sources
     tests/PythonQtTests.cpp
     tests/PythonQtTests.h
@@ -289,9 +291,9 @@ if(BUILD_TESTING)
     QT4_WRAP_CPP(test_sources
       tests/PythonQtTestCleanup.h
       )
-  endif()
 
-  set_property(SOURCE tests/PythonQtTestMain.cpp PROPERTY COMPILE_DEFINITIONS "main=tests_PythonQtTestMain")
+    set_property(SOURCE tests/PythonQtTestMain.cpp APPEND PROPERTY COMPILE_DEFINITIONS "PythonQt_Wrap_Qtcore")
+  endif()
 
   add_executable(PythonQtCppTests ${test_sources})
   target_link_libraries(PythonQtCppTests PythonQt)

tests/PythonQtTestMain.cpp

@@ -65,6 +65,7 @@ int main(int argc, char *argv[])
     Py_Finalize();
   }
 
+#ifdef PythonQt_Wrap_Qtcore
   PythonQtTestCleanup cleanup;
   failCount += QTest::qExec(&cleanup, argc, argv);
 
@@ -73,6 +74,8 @@ int main(int argc, char *argv[])
   } else {
     std::cout << "All tests passed successfully." << std::endl;
   }
+#endif
+
   return failCount;
 }