Fix copy-and-paste error in exception message.

llvm-svn: 120033
diff --git a/llvm/utils/TableGen/NeonEmitter.cpp b/llvm/utils/TableGen/NeonEmitter.cpp
index 5fa60ae..24dcaed 100644
--- a/llvm/utils/TableGen/NeonEmitter.cpp
+++ b/llvm/utils/TableGen/NeonEmitter.cpp
@@ -89,7 +89,7 @@
       return 'i';
     case 'f':
       return 'h';
-    default: throw "unhandled type in widen!";
+    default: throw "unhandled type in narrow!";
   }
   return '\0';
 }