1094 – switch bug

Originaly reported by BCS <ao@pathlink.com> in 
news:ce0a334389688c93c3bbfaa07d6@news.digitalmars.com :
# void main(char[][] argv)
# {
# switch("#!")
# {
# case "#!": writef("----Found #!\n"); break;
# case "\xFF\xFE"c: break;
# default: writef("----Found ASCII\n"); break;
# }
# }
#
# On dmd 1.009 linux and win32 this prints "----Found ASCII". Drop the middle
# case and it prints "----Found #!".
Added to DStress as
http://dstress.kuehne.cn/run/s/switch_24_A.d
http://dstress.kuehne.cn/run/s/switch_24_B.d
http://dstress.kuehne.cn/run/s/switch_24_C.d 

Fixed DMD 1.013