* MonoDevelop.Debugger/DebuggingService.cs: Added null check.
* MonoDevelop.Debugger/DebuggingService.cs: Added null check.

svn path=/trunk/monodevelop/; revision=142455

Unity-Technologies/debugger-libs,joj/debugger-libs,joj/debugger-libs,mono/debugger-libs,Unity-Technologies/debugger-libs,mono/debugger-libs