Use alias types for which members of event structs instead of plain types (#6841)

Signed-off-by: Yevhen Babiichuk (DustDFG) <dfgdust@gmail.com>

Signed-off-by: Yevhen Babiichuk (DustDFG) <dfgdust@gmail.com>

include/SDL3/SDL_events.h

@@ -274,7 +274,7 @@ typedef struct SDL_MouseMotionEvent
     Uint32 type;        /**< ::SDL_MOUSEMOTION */
     Uint64 timestamp;   /**< In nanoseconds, populated using SDL_GetTicksNS() */
     Uint32 windowID;    /**< The window with mouse focus, if any */
-    Uint32 which;       /**< The mouse instance id, or SDL_TOUCH_MOUSEID */
+    SDL_MouseID which;       /**< The mouse instance id, or SDL_TOUCH_MOUSEID */
     Uint32 state;       /**< The current button state */
     Sint32 x;           /**< X coordinate, relative to window */
     Sint32 y;           /**< Y coordinate, relative to window */
@@ -465,7 +465,7 @@ typedef struct SDL_AudioDeviceEvent
 {
     Uint32 type;        /**< ::SDL_AUDIODEVICEADDED, or ::SDL_AUDIODEVICEREMOVED */
     Uint64 timestamp;   /**< In nanoseconds, populated using SDL_GetTicksNS() */
-    Uint32 which;       /**< The audio device index for the ADDED event (valid until next SDL_GetNumAudioDevices() call), SDL_AudioDeviceID for the REMOVED event */
+    SDL_AudioDeviceID which;       /**< The audio device index for the ADDED event (valid until next SDL_GetNumAudioDevices() call), SDL_AudioDeviceID for the REMOVED event */
     Uint8 iscapture;    /**< zero if an output device, non-zero if a capture device. */
     Uint8 padding1;
     Uint8 padding2;