Make the StackFrameList::GetFrameAtIndex only fetch as many stack frames as needed to 
get the frame requested.
<rdar://problem/10943135>


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@151705 91177308-0d34-0410-b5e6-96231b3b80d8
8 files changed