patch applied (ghc): avoid adding HPC ticks to arrow constructs (fixes #1333)

[Ross Paterson]

Wed Feb  2 13:14:25 PST 2011  Ross Paterson <ross at soi.city.ac.uk>
  * avoid adding HPC ticks to arrow constructs (fixes #1333)

    M ./compiler/deSugar/Coverage.lhs -13 +114

View patch online:
http://darcs.haskell.org/cgi-bin/darcsweb.cgi?r=ghc;a=darcs_commitdiff;h=20110202211425-b47d3-c195ae8ff577940f4516290bb4b62af2173c5560.gz