modern ObjC translator. Insert line number for @synchronized statements.

llvm-svn: 167511
diff --git a/clang/lib/Rewrite/Frontend/RewriteModernObjC.cpp b/clang/lib/Rewrite/Frontend/RewriteModernObjC.cpp
index 2f2f005..a86da54 100644
--- a/clang/lib/Rewrite/Frontend/RewriteModernObjC.cpp
+++ b/clang/lib/Rewrite/Frontend/RewriteModernObjC.cpp
@@ -1855,7 +1855,9 @@
   assert((*startBuf == '@') && "bogus @synchronized location");
 
   std::string buf;
-  buf = "{ id _rethrow = 0; id _sync_obj = ";
+  SourceLocation SynchLoc = S->getAtSynchronizedLoc();
+  ConvertSourceLocationToLineDirective(SynchLoc, buf);
+  buf += "{ id _rethrow = 0; id _sync_obj = ";
   
   const char *lparenBuf = startBuf;
   while (*lparenBuf != '(') lparenBuf++;