[Bug-gnubg] Small bug in matchid.c + patch

[Philippe Michel]

szID needs one more char for the final null. See for instance 
positionid.c for accurate similar code.

*** matchid.c.orig      Wed Feb 25 10:16:53 2004
--- matchid.c   Thu Feb  3 22:22:02 2005
***************
*** 117,123 ****
  *MatchIDFromKey( unsigned char auchKey[ 9 ] ) {

      unsigned char *puch = auchKey;
!     static char szID[ 12 ];
      char *pch = szID;
      static char aszBase64[ 64 ] =
          "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
--- 117,123 ----
  *MatchIDFromKey( unsigned char auchKey[ 9 ] ) {

      unsigned char *puch = auchKey;
!     static char szID[ 13 ];
      char *pch = szID;
      static char aszBase64[ 64 ] =
          "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";