patch applied (ghc): make opt_HiVersion an Integer instead of Int to prevent overflow

[Wolfgang Thaller]

Sat Apr 14 14:40:27 PDT 2007  wolfgang.thaller at gmx.net
  * make opt_HiVersion an Integer instead of Int to prevent overflow
  
  When a snapshot version number is included, opt_HiVersion tends to exceed the range of a 32bit Int.
  
  MERGE TO STABLE

    M ./compiler/iface/LoadIface.lhs -1 +1
    M ./compiler/main/StaticFlags.hs -1 +1