text-input: fix type of send_preedit_string() args

The protocol uses a signed integer here, which is also what the
wlr_input_method_v2_preedit_string struct provides to compositors from
the input method protocol. Sway currently just passes those int32_t
values directly to this function leading to an implicit conversion.

include/wlr/types/wlr_text_input_v3.h

@@ -87,7 +87,7 @@ void wlr_text_input_v3_send_enter(struct wlr_text_input_v3 *text_input,
 // Sends leave to the currently focused surface and clears it
 void wlr_text_input_v3_send_leave(struct wlr_text_input_v3 *text_input);
 void wlr_text_input_v3_send_preedit_string(struct wlr_text_input_v3 *text_input,
-	const char *text, uint32_t cursor_begin, uint32_t cursor_end);
+	const char *text, int32_t cursor_begin, int32_t cursor_end);
 void wlr_text_input_v3_send_commit_string(struct wlr_text_input_v3 *text_input,
 	const char *text);
 void wlr_text_input_v3_send_delete_surrounding_text(

types/wlr_text_input_v3.c

@@ -42,7 +42,7 @@ void wlr_text_input_v3_send_leave(struct wlr_text_input_v3 *text_input) {
 }
 
 void wlr_text_input_v3_send_preedit_string(struct wlr_text_input_v3 *text_input,
-		const char *text, uint32_t cursor_begin, uint32_t cursor_end) {
+		const char *text, int32_t cursor_begin, int32_t cursor_end) {
 	zwp_text_input_v3_send_preedit_string(text_input->resource, text,
 		cursor_begin, cursor_end);
 }