[PMC] Optimized FixedStringArray's set_number_keyed_int() and set_integer_keyed_int() VTABLE entries to avoid unnecessary PMC and COW STRING creation; this improves the array_access.pir benchmark performance by 13.28%.
[PMC] Optimized FixedStringArray's set_number_keyed_int() and
set_integer_keyed_int() VTABLE entries to avoid unnecessary PMC and COW STRING
creation; this improves the array_access.pir benchmark performance by 13.28%.

git-svn-id: 6e74a02f85675cec270f5d931b0f6998666294a3@41463 d31e2699-5ff4-0310-a27c-f18f2fbe73fe

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