Bug 1257410 - Use %p and cast in printf to avoid C4477 on VS2015; r=khuey

MozReview-Commit-ID: 21XrhzPiJFQ

--HG--
extra : rebase_source : a9375998fcf663bf2b285cc2105778836eedffa8

xpcom/tests/windows/TestCOM.cpp

@@ -54,7 +54,7 @@ MozExternalRefCountType nsTestCom::AddRef()
 {
   nsrefcnt res = ++mRefCnt;
   NS_LOG_ADDREF(this, mRefCnt, "nsTestCom", sizeof(*this));
-  printf("nsTestCom: Adding ref = %d\n", res);
+  printf("nsTestCom: Adding ref = %p\n", (void *)res);
   return res;
 }
 
@@ -62,7 +62,7 @@ MozExternalRefCountType nsTestCom::Release()
 {
   nsrefcnt res = --mRefCnt;
   NS_LOG_RELEASE(this, mRefCnt, "nsTestCom");
-  printf("nsTestCom: Releasing = %d\n", res);
+  printf("nsTestCom: Releasing = %p\n", (void *)res);
   if (res == 0) {
     delete this;
   }