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

config_gram.y

@@ -1395,7 +1395,7 @@ static int parse_cmdbits(OPCODE * op)
   char * e;
   char * q;
   int len;
-  char * s, *brkt;
+  char * s, *brkt = NULL;
 
   bitno = 32;
   while (lsize(string_list)) {