fixing Qvg graphics item import issue

pykat/gui/graphics.py

@@ -8,6 +8,7 @@ Created on Fri Feb 01 09:13:03 2013
 from PyQt4.QtGui import *
 from PyQt4.Qt import *
 from PyQt4 import QtSvg
+from PyQt4.QtSvg import QGraphicsSvgItem
 import pykat.components
 import exceptions
 
@@ -187,4 +188,4 @@ class ComponentQGraphicsItem(QtSvg.QGraphicsSvgItem):
                     conn[1].getQGraphicsItem().refresh()
                    
         return QGraphicsSvgItem.itemChange(self, change, value)
-            
\ No newline at end of file
+