Removed SDL_DROPEVENT_DATA_SIZE and SDL_TEXTEDITINGEVENT_TEXT_SIZE

Fixes https://github.com/libsdl-org/SDL/issues/9681

docs/README-migration.md

@@ -398,7 +398,9 @@ The following symbols have been renamed:
 * SDL_USEREVENT => SDL_EVENT_USER
 
 The following symbols have been removed:
+* SDL_DROPEVENT_DATA_SIZE - drop event data is dynamically allocated
 * SDL_SYSWMEVENT - you can use SDL_SetWindowsMessageHook() and SDL_SetX11EventHook() to watch and modify system events before SDL sees them.
+* SDL_TEXTEDITINGEVENT_TEXT_SIZE - text editing event data is dynamically allocated
 
 The following structures have been renamed:
 * SDL_ControllerAxisEvent => SDL_GamepadAxisEvent

include/SDL3/SDL_events.h

@@ -313,8 +313,6 @@ typedef struct SDL_KeyboardEvent
     SDL_Keysym keysym;  /**< The key that was pressed or released */
 } SDL_KeyboardEvent;
 
-#define SDL_TEXTEDITINGEVENT_TEXT_SIZE 64
-
 /**
  * Keyboard text editing event structure (event.edit.*)
  *
@@ -664,8 +662,6 @@ typedef struct SDL_TouchFingerEvent
 } SDL_TouchFingerEvent;
 
 
-#define SDL_DROPEVENT_DATA_SIZE 64
-
 /**
  * Pressure-sensitive pen touched or stopped touching surface (event.ptip.*)
  *

src/video/wayland/SDL_waylandevents.c

@@ -2296,7 +2296,6 @@ static void text_input_preedit_string(void *data,
                                       int32_t cursor_end)
 {
     SDL_WaylandTextInput *text_input = data;
-    char buf[SDL_TEXTEDITINGEVENT_TEXT_SIZE];
     text_input->has_preedit = SDL_TRUE;
     if (text) {
         int cursor_begin_utf8 = cursor_begin >= 0 ? (int)SDL_utf8strnlen(text, cursor_begin) : -1;
@@ -2313,8 +2312,7 @@ static void text_input_preedit_string(void *data,
         }
         SDL_SendEditingText(text, cursor_begin_utf8, cursor_size_utf8);
     } else {
-        buf[0] = '\0';
-        SDL_SendEditingText(buf, 0, 0);
+        SDL_SendEditingText("", 0, 0);
     }
 }