Fix more warnings building with VC++


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14391 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Bytecode/Writer/Writer.cpp b/lib/Bytecode/Writer/Writer.cpp
index 5b6fdd7..3a17508 100644
--- a/lib/Bytecode/Writer/Writer.cpp
+++ b/lib/Bytecode/Writer/Writer.cpp
@@ -340,8 +340,6 @@
 
     for (; I != End; ++I) {
       // Symtab entry: [def slot #][name]
-      const Value *V = I->second;
-
       Slot = Table.getSlot(I->second);
       assert(Slot != -1 && "Value in symtab but has no slot number!!");
       output_vbr((unsigned)Slot, Out);
@@ -380,7 +378,7 @@
     }
     
     // Write out the chunk...
-    Out.write((char*)ChunkPtr, LastPtr-ChunkPtr);
+    Out.write((char*)ChunkPtr, unsigned(LastPtr-ChunkPtr));
   }
 
   Out.flush();