Make -Wsemicolon-before-method-body opt-in (and part of -Wextra).  Addresses <rdar://problem/7381735>.

llvm-svn: 86731
diff --git a/clang/lib/Parse/ParseObjc.cpp b/clang/lib/Parse/ParseObjc.cpp
index d06d8b6..478bdcb 100644
--- a/clang/lib/Parse/ParseObjc.cpp
+++ b/clang/lib/Parse/ParseObjc.cpp
@@ -1410,7 +1410,7 @@
   // parse optional ';'
   if (Tok.is(tok::semi)) {
     if (ObjCImpDecl)
-      Diag(Tok, diag::warn_semicolon_before_method_nody);
+      Diag(Tok, diag::warn_semicolon_before_method_body);
     ConsumeToken();
   }