SHSTKQtMacros.cmake private headers fix

SHSTKQtMacros.cmake

@@ -156,7 +156,9 @@ macro(shstk_qt_project NAME IS_APP DOMAIN _MODULES _LIBS)
 	endif()
 	qt_target_link_libraries(${PROJECT_NAME} ${_LIBS})
 	file(GLOB_RECURSE PHS  "*_p.h")
+	if ((NOT "x${out_HDR}" STREQUAL "x") AND (NOT "x${PHS}" STREQUAL "x"))
 		list(REMOVE_ITEM out_HDR "${PHS}")
+	endif()
 	#message(STATUS "Building ${PROJECT_NAME}")
 	if (EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/plugin")
 		set(_${NAME}_PLUGIN_LIBS "${_LIBS}")