libobjc - minor get_imp fix

["Nicola Pero" <nicola dot pero at meta-innovation dot com>]

Patch from Richard Frith-Macdonald <rfm@gnu.org>.  Committed to trunk.

Thanks

Index: sendmsg.c
===================================================================
--- sendmsg.c   (revision 167090)
+++ sendmsg.c   (working copy)
@@ -189,8 +189,13 @@ get_imp (Class class, SEL sel)
              /* The dispatch table has been installed, and the method
                 is not in the dispatch table.  So the method just
                 doesn't exist for the class.  Return the forwarding
-                implementation. */
-             res = __objc_get_forward_imp ((id)class, sel);
+                implementation.  We don't know the receiver (only its
+                class), so we have to pass 'nil' as the first
+                argument.  Passing the class as first argument is
+                wrong because the class is not the receiver; it can
+                result in us calling a class method when we want an
+                instance method of the same name.  */
+             res = __objc_get_forward_imp (nil, sel);
            }
        }
     }
Index: ChangeLog
===================================================================
--- ChangeLog   (revision 167090)
+++ ChangeLog   (working copy)
@@ -1,3 +1,9 @@
+2010-11-23  Richard Frith-Macdonald <rfm@gnu.org>
+
+       * sendmsg.c (get_imp): Fixed call to __objc_get_forward_imp to
+       pass nil as the receiver since we don't know the receiver at this
+       point.
+       
 2010-11-18  Nicola Pero  <nicola.pero@meta-innovation.com>
 
        * ivars.c: Include stdlib.h.