Per Daniel's suggestion, remove default case from switch statement to make
uncaught language cases a compile warning instead of a runtime error.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67325 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/Driver/clang.cpp b/Driver/clang.cpp
index a2ec08a..1d5014e 100644
--- a/Driver/clang.cpp
+++ b/Driver/clang.cpp
@@ -571,7 +571,7 @@
   if (LangStd == lang_unspecified) {
     // Based on the base language, pick one.
     switch (LK) {
-    default: assert(0 && "Unknown base language");
+    case lang_unspecified: assert(0 && "Unknown base language");
     case langkind_c:
     case langkind_asm_cpp:
     case langkind_c_cpp: