Fix scrcpy() return value

The scrcpy() function returns a SDL_bool to indicate its success, but
was initialized to 0 (SDL_FALSE) instead of SDL_TRUE.

app/src/main.c

@@ -183,8 +183,6 @@ static int parse_args(struct args *args, int argc, char *argv[]) {
 }
 
 int main(int argc, char *argv[]) {
-    int res;
-
     struct args args = {
         .serial = NULL,
         .help = SDL_FALSE,
@@ -210,7 +208,7 @@ int main(int argc, char *argv[]) {
 
     SDL_LogSetAllPriority(SDL_LOG_PRIORITY_DEBUG);
 
-    res = scrcpy(args.serial, args.port, args.max_size, args.bit_rate) ? 0 : 1;
+    int res = scrcpy(args.serial, args.port, args.max_size, args.bit_rate) ? 0 : 1;
 
     avformat_network_deinit(); // ignore failure
 

app/src/scrcpy.c

@@ -519,7 +519,7 @@ void event_loop(void) {
 }
 
 SDL_bool scrcpy(const char *serial, Uint16 local_port, Uint16 max_size, Uint32 bit_rate) {
-    SDL_bool ret = 0;
+    SDL_bool ret = SDL_TRUE;
 
     process_t push_proc = push_server(serial);
     if (wait_for_success(push_proc, "adb push")) {