Fix pretty-printing of if conditions. Patch by Ben Lickly.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@64027 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/StmtPrinter.cpp b/lib/AST/StmtPrinter.cpp
index 1f07db7..49292af 100644
--- a/lib/AST/StmtPrinter.cpp
+++ b/lib/AST/StmtPrinter.cpp
@@ -202,8 +202,9 @@
 }
 
 void StmtPrinter::PrintRawIfStmt(IfStmt *If) {
-  OS << "if ";
+  OS << "if (";
   PrintExpr(If->getCond());
+  OS << ')';
   
   if (CompoundStmt *CS = dyn_cast<CompoundStmt>(If->getThen())) {
     OS << ' ';