llvm-nm: Don't leak bitcode buffers.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141534 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/llvm-nm/llvm-nm.cpp b/tools/llvm-nm/llvm-nm.cpp
index 10cf450..550ca4f 100644
--- a/tools/llvm-nm/llvm-nm.cpp
+++ b/tools/llvm-nm/llvm-nm.cpp
@@ -330,10 +330,10 @@
         OwningPtr<Binary> child;
         if (error_code ec = i->getAsBinary(child)) {
           // Try opening it as a bitcode file.
-          MemoryBuffer *buff = i->getBuffer();
+          OwningPtr<MemoryBuffer> buff(i->getBuffer());
           Module *Result = 0;
           if (buff)
-            Result = ParseBitcodeFile(buff, Context, &ErrorMessage);
+            Result = ParseBitcodeFile(buff.get(), Context, &ErrorMessage);
 
           if (Result) {
             DumpSymbolNamesFromModule(Result);