fix double spaces in example

Signed-off-by: Stephan Lachnit <stephanlachnit@protonmail.com>

example/main.c

@@ -40,7 +40,7 @@ int main(void)
 	/* Request we start game mode */
 	if (gamemode_request_start() != 0) {
 		fprintf(stderr, "Failed to request gamemode start: %s...\n", gamemode_error_string());
-		return  EXIT_FAILURE;
+		return EXIT_FAILURE;
 	}
 
 	/* Simulate running a game */
@@ -49,7 +49,7 @@ int main(void)
 	/* Request we end game mode (optional) */
 	if (gamemode_request_end() != 0) {
 		fprintf(stderr, "Failed to request gamemode end: %s...\n", gamemode_error_string());
-		return  EXIT_FAILURE;
+		return EXIT_FAILURE;
 	}
 
 	return EXIT_SUCCESS;