buffer: Don't miss return value on Windows build

... and use InterlockedExchangeAdd64 for the 64bit value.
InterlockedExchangeAdd is 32bit version.

diff --git a/gst/gstbuffer.c b/gst/gstbuffer.c
index 1e79acf..b68ded3 100644 (file)
--- a/gst/gstbuffer.c
+++ b/gst/gstbuffer.c
@@ -178,7 +178,7 @@ gst_atomic_int64_inc (volatile gint64 * atomic)
 static inline gint64
 gst_atomic_int64_inc (volatile gint64 * atomic)
 {
-  InterlockedExchangeAdd (atomic, 1);
+  return InterlockedExchangeAdd64 (atomic, 1);
 }
 #else
 #warning No 64-bit atomic int defined for this platform/toolchain!