Changeset 9074:ab04a589d80c
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gcc: Fix warnings for gcc 4.7 and clang 3.1

This patch fixes two warnings, one related to a narrowing conversion
(int to MachInst), and one due to the cast operator for arguments and
a mismatch in const-ness (const void* and void*).

util/regress all passing (disregarding t1000 and eio)

compiled with gcc 4.3 - 4.7 and clang 2.9 - 3.1