Fix a few warnings that came up recently (some of them only triggered

by recent GCC versions).
* config_gram.y (parse_cmdbits): "brkt possibly used uninitialized"
(GCC errs here)
* jtagmkII.c (jtagmkII_reset32): "status possibly used uninitialized"
(I think GCC errs, too)
* buspirate.c: "pointers differ in signedness" (mismatch between
string processing and the use of "unsigned char" throughought the
AVRDUDE API)



git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk/avrdude@882 81a1dc3b-b13d-400b-aceb-764788c761c2

jtagmkII.c

@@ -2618,6 +2618,8 @@ static int jtagmkII_reset32(PROGRAMMER * pgm, unsigned short flags)
           "%s: jtagmkII_reset32(%2.2x)\n",
           progname, flags);
 
+  status = -1;
+
   // Happens at the start of a programming operation
   if(flags & AVR32_RESET_READ) {
     buf[0] = CMND_GET_IR;