fix to peek command.

git-svn-id: svn://svn.berlios.de/openocd/trunk@747 b42882b7-edfa-0310-969c-e2dbd0fdcd60

src/tcl/commands.tcl

 # implements Tcl procedures/functions
 proc peek {address} {
-	return [openocd mdw $address]
+	return [openocd_throw "mdw $address"]
 }
 
 # Production command