quake: fix errorneous endian-correcting reads

ef9ee89 introduced Read{Big,Little}{Short,Long,Float} functions to safely
read a value in memory. These incorrectly take char*, which causes them to
output erroneous 0xff bytes when given bytes with bit 7 set.

Change-Id: I9531172301aecfdacae405d2f782f662608ce6df
3 files changed