Debug: print output on --debug-fpe

in practice often we want to breakpoint here (instead of flooding output)
but its confusing the option does nothing in release builds.

Devs can comment out locally.

source/creator/creator.c

@@ -202,7 +202,7 @@ static bool use_crash_handler = true;
 #if defined(__linux__) || defined(_WIN32) || defined(OSX_SSE_FPE)
 static void fpe_handler(int UNUSED(sig))
 {
-	// printf("SIGFPE trapped\n");
+	fprintf(stderr, "debug: SIGFPE trapped\n");
 }
 #endif