Silence -Wreturn-type warnings

Address a couple of instances of -Wreturn-type warning from GCC.  The switches
are covered, add an llvm_unreachable to the end of the functions to silence the
warning.  NFC.

llvm-svn: 258546

1 files changed, 1 insertions, 0 deletions

diff --git a/lldb/source/Expression/ExpressionSourceCode.cpp b/lldb/source/Expression/ExpressionSourceCode.cpp
index 93bac62c43c..2601727cf35 100644
--- a/lldb/source/Expression/ExpressionSourceCode.cpp
+++ b/lldb/source/Expression/ExpressionSourceCode.cpp
@@ -119,6 +119,7 @@ public:
             default:
                 return false;
         }
+        llvm_unreachable("unhandled state");
     }
 
 private: