fix: mrbgems\mruby-time\src\time.c(372): warning C4244: 'function': conversion...

fix: mrbgems\mruby-time\src\time.c(372): warning C4244: 'function': conversion from 'mrb_int' to 'double', possible loss of data

mrbgems/mruby-time/src/time.c

@@ -369,7 +369,7 @@ time_mktime(mrb_state *mrb, mrb_int ayear, mrb_int amonth, mrb_int aday,
     mrb_raise(mrb, E_ARGUMENT_ERROR, "Not a valid time.");
   }
 
-  return time_alloc(mrb, (double)nowsecs, ausec, timezone);
+  return time_alloc(mrb, (double)nowsecs, (double)ausec, timezone);
 }
 
 /* 15.2.19.6.2 */