synchronise with the template

- use the version of audio management which doesn't crash the
application if something goes wrong
- include colour32
- update error management to be more reflective of the one defined in
the template
- modify the renderer functions to be more reflective of the template
- modify the game functions to be more reflective of the template (& use
a more failproof method of initializing)
- add gametime
- remove set_gamestatus logic and just use a run boolean in gamedata
- remove emscripten preprocessors as those haven't really been used

src/error.c

@@ -16,16 +16,6 @@
     (void)vsnprintf(buf, PRINT_BUFFER_SIZE, fmt, args); \
     va_end(args);
 
-static gamestatus status = STATUS_RUNNING;
-
-void set_gamestatus(gamestatus nstatus) {
-    status = nstatus;
-}
-
-gamestatus get_gamestatus(void) {
-    return status;
-}
-
 void debug(char const* fmt, ...) {
     char const* env = getenv("DEBUG");
     if (env == NULL || *env != '1')
@@ -52,20 +42,19 @@ void warn(char const* fmt, ...) {
 void error(char const* fmt, ...) {
     char buf[PRINT_BUFFER_SIZE] = {0};
     write_args(buf, fmt);
-    (void)fprintf(stderr, "\033[mE: %s\033[0m", buf);
+    (void)fprintf(stderr, "\033[91mE: %s\033[0m", buf);
 }
 
-noreturn void fatal(gamestatus error_code, char const* fmt, ...) {
+noreturn void fatal(gamestatus error_code, char const* fname, uint32_t ln, char const* fmt, ...) {
     char buf1[PRINT_BUFFER_SIZE] = {0};
     write_args(buf1, fmt);
 
     char buf2[PRINT_BUFFER_SIZE * 2] = {0};
-    sprintf(buf2, "%s\nexitcode: %u", buf1, error_code);
+    sprintf(buf2, "%s\n    at %s:%u (exitcode: %u)", buf1, fname, ln, error_code);
 
     (void)fprintf(stderr, "\033[101mF: %s\033[0m\n", buf2);
     SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "something went wrong! :O", buf2, NULL);
 
     // set status, but exit immediately, as code is not allowed to execute beyond this point
-    set_gamestatus(error_code);
-    exit(status);
+    exit(error_code);
 }