add missing newlines at end of dos sources.

src/core/dos/SDL_dos_scheduler.h

@@ -104,4 +104,4 @@ void DOS_DestroyThread(int thread_id);
 }
 #endif
 
-#endif // SDL_dos_scheduler_h_
+#endif // SDL_dos_scheduler_h_

src/joystick/dos/SDL_sysjoystick.c

@@ -339,4 +339,4 @@ SDL_JoystickDriver SDL_DOS_JoystickDriver = {
     DOS_JoystickGetGamepadMapping
 };
 
-#endif /* SDL_JOYSTICK_DOS */
+#endif /* SDL_JOYSTICK_DOS */

src/thread/dos/SDL_sysmutex.c

@@ -119,4 +119,4 @@ void SDL_UnlockMutex(SDL_Mutex *mutex) SDL_NO_THREAD_SAFETY_ANALYSIS
     DOS_EnableInterrupts();
 }
 
-#endif /* SDL_THREAD_DOS */
+#endif /* SDL_THREAD_DOS */

src/thread/dos/SDL_syssem.c

@@ -112,4 +112,4 @@ void SDL_SignalSemaphore(SDL_Semaphore *sem)
     DOS_EnableInterrupts();
 }
 
-#endif /* SDL_THREAD_DOS */
+#endif /* SDL_THREAD_DOS */

src/thread/dos/SDL_systhread.c

@@ -84,4 +84,4 @@ bool SDL_SYS_SetThreadPriority(SDL_ThreadPriority priority)
     return true;
 }
 
-#endif /* SDL_THREAD_DOS */
+#endif /* SDL_THREAD_DOS */

src/thread/dos/SDL_systhread_c.h

@@ -25,4 +25,4 @@
 /* DOS thread handle is an integer thread ID from the DOS scheduler */
 typedef int SYS_ThreadHandle;
 
-#endif /* SDL_systhread_c_h_ */
+#endif /* SDL_systhread_c_h_ */

src/thread/dos/SDL_systls.c

@@ -18,6 +18,7 @@
      misrepresented as being the original software.
   3. This notice may not be removed or altered from any source distribution.
 */
+
 #include "SDL_internal.h"
 
 #ifdef SDL_THREAD_DOS
@@ -60,4 +61,4 @@ void SDL_SYS_QuitTLSData(void)
     SDL_memset(tls_data, 0, sizeof(tls_data));
 }
 
-#endif /* SDL_THREAD_DOS */
+#endif /* SDL_THREAD_DOS */

src/timer/dos/SDL_systimer.c

@@ -67,4 +67,4 @@ void SDL_SYS_DelayNS(Uint64 ns)
     }
 }
 
-#endif /* SDL_TIMER_DOS */
+#endif /* SDL_TIMER_DOS */

src/video/dos/SDL_dosmodes.h

@@ -47,4 +47,4 @@ extern const char *DOSVESA_GetGPUName(void);
 // Combination: a usable banked window must be both supported and writable
 #define VBE_WINATTR_USABLE (VBE_WINATTR_SUPPORTED | VBE_WINATTR_WRITABLE)
 
-#endif // SDL_dosmodes_h_
+#endif // SDL_dosmodes_h_