BUG: fix for bug 5464 better find boost for windows

Modules/FindBoost.cmake

@@ -72,7 +72,7 @@ SET(BOOST_DIR_MESSAGE "Set the Boost_INCLUDE_DIR cmake cache entry to the ${BOOS
 SET(BOOST_DIR_SEARCH $ENV{BOOST_ROOT})
 IF(BOOST_DIR_SEARCH)
   FILE(TO_CMAKE_PATH ${BOOST_DIR_SEARCH} BOOST_DIR_SEARCH)
-  SET(BOOST_DIR_SEARCH ${BOOST_DIR_SEARCH}/include)
+  SET(BOOST_DIR_SEARCH ${BOOST_DIR_SEARCH} ${BOOST_DIR_SEARCH}/include)
 ENDIF(BOOST_DIR_SEARCH)
 
 IF(WIN32)