macosx: fixed too early reset when scrolling the credits

modules/gui/macosx/about.m

@@ -68,8 +68,8 @@ static VLAboutBox *_o_sharedInstance = nil;
 }
 
 /*****************************************************************************
-* VLC About Window
-*****************************************************************************/
+ * VLC About Window
+ *****************************************************************************/
 
 - (void)showAbout
 {
@@ -93,13 +93,13 @@ static VLAboutBox *_o_sharedInstance = nil;
 
         /* setup the creator / revision field */
         NSString *compiler;
-        #ifdef __clang__
+#ifdef __clang__
         compiler = [NSString stringWithFormat:@"clang %s", __clang_version__];
-        #elif __llvm__
+#elif __llvm__
         compiler = [NSString stringWithFormat:@"llvm-gcc %s", __VERSION__];
-        #else
+#else
         compiler = [NSString stringWithFormat:@"gcc %s", __VERSION__];
-        #endif
+#endif
         [o_revision_field setStringValue: 
          [NSString stringWithFormat: _NS("Compiled by %s with %@"), VLC_CompileBy(), compiler]];
 
@@ -166,8 +166,14 @@ static VLAboutBox *_o_sharedInstance = nil;
         /* If at end, restart at the top */
         if( f_current >= f_end )
         {
-            [o_credits_textview scrollPoint:NSMakePoint( 0, 0 )];
+            /* f_end may be wrong on first run, so don't trust it too much */
+            if( f_end == [o_credits_textview bounds].size.height - [o_credits_scrollview bounds].size.height ) 
+            {
                 b_restart = YES;
+                [o_credits_textview scrollPoint:NSMakePoint( 0, 0 )];
+            }
+            else
+                f_end = [o_credits_textview bounds].size.height - [o_credits_scrollview bounds].size.height;
         }
     }
 }
@@ -179,8 +185,8 @@ static VLAboutBox *_o_sharedInstance = nil;
 }
 
 /*****************************************************************************
-* VLC GPL Window, action called from the about window and the help menu
-*****************************************************************************/
+ * VLC GPL Window, action called from the about window and the help menu
+ *****************************************************************************/
 
 - (IBAction)showGPL:(id)sender
 {
@@ -192,8 +198,8 @@ static VLAboutBox *_o_sharedInstance = nil;
 }
 
 /*****************************************************************************
-* VLC Generic Help Window
-*****************************************************************************/
+ * VLC Generic Help Window
+ *****************************************************************************/
 
 - (void)showHelp
 {