Verify that we have a valid breakpoint ID before proceeding with retrieving its number of locations.  This fixed a crasher.
Verify that we have a valid breakpoint ID before proceeding with retrieving its
number of locations.  This fixed a crasher.


git-svn-id: b33bab8abb5b18c12ee100cd7761ab452d00b2b0@115092 91177308-0d34-0410-b5e6-96231b3b80d8

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