Bug in the `sbpr' command of mixvm

Hi,

There's a problem with the command `sbpr' that set a conditional
breakpoint on register change.  For example, `sbpr I2' should set a
breakpoint when the value in rI2 changes but the breakpoint will be
set when the value of rI1 changes instead.  Here's a patch that fixes
the problem:

--- mixlib/xmix_vm_handlers.c.orig	2005-09-20 22:43:13.000000000 +0300
+++ mixlib/xmix_vm_handlers.c	2010-09-23 10:28:32.000000000 +0300
@@ -1089,7 +1089,7 @@
 	  {
 	    int i = arg[1] - '1';
 	    if (i >= 0 && i < 6)
-	      pred = MIX_PRED_REG_I1 - 1 + i;
+	      pred = MIX_PRED_REG_I1 + i;
 	  }
       }
       break;