Add ability set empty values for variables.

pym/cl_share_cmd.py

@@ -57,7 +57,7 @@ class share_cmd(color_print, _error):
                 for val in vals.split(','):
                     k,o,v = val.partition('=')
                     if self.logicObj.clVars.exists(k):
-                        if not self.logicObj.clVars.SetWriteVar(k,v):
+                        if self.logicObj.clVars.SetWriteVar(k,v) == False:
                             return False
                     else:
                         self.printERROR(_('variable %s not found')%k)