ENH: fix for older versions of cmake

Source/WXDialog/bin/FindwxWin.cmake

@@ -390,12 +390,12 @@ ELSE( WIN32 )
           SET(LAST_FRAME 1)
         ELSE(${arg} MATCHES "-framework")
           # not a -framework argument
-          IF(${LAST_FRAME} EQUAL 1)
+          IF(LAST_FRAME)
             SET(WXWINDOWS_LIBRARIES ${WXWINDOWS_LIBRARIES} "-framework ${arg}")
             SET(LAST_FRAME 0)
-          ELSE(${LAST_FRAME} EQUAL 1)
+          ELSE(LAST_FRAME)
             SET(WXWINDOWS_LIBRARIES ${WXWINDOWS_LIBRARIES} ${arg})
-          ENDIF(${LAST_FRAME} EQUAL 1)
+          ENDIF(LAST_FRAME)
         ENDIF(${arg} MATCHES "-framework")
       ENDFOREACH(arg)
     ENDIF(CMAKE_WX_CONFIG)