add -DQWT_DLL to windows build

git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@12699 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: jef

CMakeLists.txt

@@ -302,6 +302,7 @@ IF (WIN32)
     ADD_DEFINITIONS("-DGUI_EXPORT=__declspec(dllimport)")
     ADD_DEFINITIONS("-DPYTHON_EXPORT=__declspec(dllimport)")
     ADD_DEFINITIONS("-DANALYSIS_EXPORT=__declspec(dllimport)")
+    ADD_DEFINITIONS("-DQWT_DLL")
   ELSE (MSVC)
     ADD_DEFINITIONS("\"-DCORE_EXPORT=__declspec(dllimport)\"")
     ADD_DEFINITIONS("\"-DGUI_EXPORT=__declspec(dllimport)\"")