bug report and fixed in the dice compiling

[Guanghui, Cheng]

Hello:
	In the ubuntu 9.10 with default bison version 2.4.1 the dice configure
script failed to check the valid bison version:

the old one:
20627  if test "(" "${1}" = "2" -a "(" "${2}" = "1a" -o "${2}" = "1b" -o
"${2}" = "2" -o "${2}" = "3" ")" ")"; then
20628     dice_bison_version="${1}.${2} (ok)"
20629   else
20630     dice_bison_version=invalid
20631   fi

this verification is only available for bison version 2.1a, 2.2 and 2.3.
it will be invalid in the bison 2.4 and later.

the new one:
 20626   set `$YACC --version|grep 'GNU Bison'|cut -d ' ' -f 4|sed -e
's/\./ /'`
20627  if test "(" "${1}" = "2" -a "(" "${2}" = "1a" -o "${2}" = "1b" -o
"${2}" = "2" -o "${2}" = "3" -o "${2}" = "4" -o "${2}" = "4.1" -o "${2}"
= "4.2" ")" ")"; then
20628     dice_bison_version="${1}.${2} (ok)"
20629   else
20630     dice_bison_version=invalid
	That's all.
						Cheng Guanghui