freetype: Fixed several off-by-one / length checks missing

This freetype2 update fixes sign extension problems and
missing length checks.

This issue was used in one of the last jailbreakme exploits
for Apple iPhone/iPad products. (CVE-2011-0226)

Fixed bugs
bnc#704612
VUL-0: freetype: off-by-one / length checks missing in psaux/psobjs.c
Selected Binaries
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