<rdar://problem/13925432>

A user request such as: memory read -fc -s10 -c1 *charPtrPtr would cause us to crash upon trying to read 1 char of size 10 from memory
This request is now translated into: memory read -fc -s1 -c10 *charPtrPtr (i.e. read 10 chars of size 1 from memory) which is probably also what the user originally wanted

llvm-svn: 182398