Fixing issue2550613 - Fix a 'got multiple values for keyword argument 'value'' error

diff -r 5a0649525e1e -r dc6b98625a53 roundup/cgi/templating.py
--- a/roundup/cgi/templating.py	Tue Nov 24 20:26:52 2009 +0000
+++ b/roundup/cgi/templating.py	Wed Dec 16 11:54:04 2009 -0500
@@ -2129,16 +2129,19 @@
             return self.plain(escape=1)
 
         linkcl = self._db.getclass(self._prop.classname)
-        value = self._value[:]
         # map the id to the label property
         if not linkcl.getkey():
             showid=1
-        if not showid:
-            k = linkcl.labelprop(1)
-            value = lookupKeys(linkcl, k, value)
-        value = ','.join(value)
-        return self.input(name=self._formname, size=size, value=value,
-                          **kwargs)
+
+        if 'value' not in kwargs:
+            value = self._value[:]
+            if not showid:
+                k = linkcl.labelprop(1)
+                value = lookupKeys(linkcl, k, value)
+            value = ','.join(value)
+            kwargs['value'] = value
+
+        return self.input(name=self._formname, size=size, **kwargs)
 
     def menu(self, size=None, height=None, showid=0, additional=[],
              value=None, sort_on=None, html_kwargs = {}, **conditions):