Make sure to close the file before deleting it

llvm-svn: 3905
diff --git a/llvm/tools/dis/dis.cpp b/llvm/tools/dis/dis.cpp
index 8d1749c..166a178 100644
--- a/llvm/tools/dis/dis.cpp
+++ b/llvm/tools/dis/dis.cpp
@@ -115,7 +115,10 @@
 
   Passes.run(*M.get());
 
-  if (Out != &std::cout) delete Out;
+  if (Out != &std::cout) {
+    ((std::ofstream*)Out)->close();
+    delete Out;
+  }
   return 0;
 }