[TableGen] Fix a bug introduced in r256627. If the switch was not emitted we still emitted a closing curly brace.

llvm-svn: 256697
diff --git a/llvm/utils/TableGen/AsmMatcherEmitter.cpp b/llvm/utils/TableGen/AsmMatcherEmitter.cpp
index 4ec08b2..2ec6544 100644
--- a/llvm/utils/TableGen/AsmMatcherEmitter.cpp
+++ b/llvm/utils/TableGen/AsmMatcherEmitter.cpp
@@ -2170,11 +2170,12 @@
       OS << "    return false;\n";
     }
   }
-  OS << "  }\n";
 
   // If there were case statements emitted into the string stream write the
   // default.
-  if (!EmittedSwitch)
+  if (EmittedSwitch)
+    OS << "  }\n";
+  else
     OS << "  return false;\n";
 
   OS << "}\n\n";