Added transitive dependency to pe to python_module

apps/pythonmodule/CMakeLists.txt

@@ -9,7 +9,7 @@ if ( WALBERLA_BUILD_WITH_PYTHON_MODULE )
     endif()
 
     if (WALBERLA_BUILD_WITH_OPENMESH)
-        set(PYTHON_MODULE_DEPENDENCIES ${PYTHON_MODULE_DEPENDENCIES} mesh)
+        set(PYTHON_MODULE_DEPENDENCIES ${PYTHON_MODULE_DEPENDENCIES} mesh pe)
     endif()
 
     if( WALBERLA_CXX_COMPILER_IS_MSVC )
@@ -40,4 +40,4 @@ if ( WALBERLA_BUILD_WITH_PYTHON_MODULE )
 
     add_test( NAME PythonModuleTest
               COMMAND ${PYTHON_EXECUTABLE} -m unittest discover -v -s ${walberla_SOURCE_DIR}/python/waLBerla_tests )
-endif()
+endif()
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