macosx: avoid NS_ENUM to fix compilation on snow leopard

modules/gui/macosx/misc.h

@@ -245,7 +245,7 @@
  *****************************************************************************/
 
 #ifndef MAC_OS_X_VERSION_10_8
-typedef NS_ENUM(NSInteger, NSByteCountFormatterCountStyle) {
+enum {
     // Specifies display of file or storage byte counts. The actual behavior for this is platform-specific; on OS X 10.7 and less, this uses the binary style, but decimal style on 10.8 and above
     NSByteCountFormatterCountStyleFile   = 0,
     // Specifies display of memory byte counts. The actual behavior for this is platform-specific; on OS X 10.7 and less, this uses the binary style, but that may change over time.
@@ -254,6 +254,7 @@ typedef NS_ENUM(NSInteger, NSByteCountFormatterCountStyle) {
     NSByteCountFormatterCountStyleDecimal = 2,    // 1000 bytes are shown as 1 KB
     NSByteCountFormatterCountStyleBinary  = 3     // 1024 bytes are shown as 1 KB
 };
+typedef NSInteger NSByteCountFormatterCountStyle;
 #endif
 
 @interface VLCByteCountFormatter : NSFormatter {