Fixed errors in AllocatedBlock: - Allow zero byte size request for memory and ensure it gets a unique address - Exit the free block loop when we find an appropriate free block
Fixed errors in AllocatedBlock:
- Allow zero byte size request for memory and ensure it gets a unique address
- Exit the free block loop when we find an appropriate free block

<rdar://problem/30644888>



git-svn-id: 4c4cc70b1ef44ba2b7963015e681894188cea27e@295907 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/lldb,llvm-mirror/lldb,apple/swift-lldb,llvm-mirror/lldb,apple/swift-lldb,apple/swift-lldb,apple/swift-lldb,apple/swift-lldb,llvm-mirror/lldb,llvm-mirror/lldb,apple/swift-lldb