BUG: fix for bug 4399

Modules/FindQt4.cmake

@@ -526,6 +526,7 @@ IF (QT4_QMAKE_FOUND)
     PATHS
     ${QT_INCLUDE_DIR}/QtAssistant
     ${QT_HEADERS_DIR}/QtAssistant
+    ${QT_LIBRARY_DIR}/QtAssistant.framework/Headers
     NO_DEFAULT_PATH
     )
 
@@ -533,7 +534,8 @@ IF (QT4_QMAKE_FOUND)
   FIND_PATH(QT_QTDESIGNER_INCLUDE_DIR QDesignerComponents
     PATHS
     ${QT_INCLUDE_DIR}/QtDesigner
-    ${QT_HEADERS_DIR}/QtDesigner
+    ${QT_HEADERS_DIR}/QtDesigner 
+    ${QT_LIBRARY_DIR}/QtDesigner.framework/Headers
     NO_DEFAULT_PATH
     )