extmod/utime: Always invoke mp_hal_delay_ms when >= to 0ms.

nevercast · dpgeorge · commit db6d60b07967 · 2021-07-22T00:05:17.000+10:00
This makes sleep_ms(0) useful as a "yield" so event processing and thread switching can take place. Fixes issue #5345.
diff --git a/extmod/utime_mphal.c b/extmod/utime_mphal.c
@@ -48,7 +48,7 @@ MP_DEFINE_CONST_FUN_OBJ_1(mp_utime_sleep_obj, time_sleep);
 
 STATIC mp_obj_t time_sleep_ms(mp_obj_t arg) {
     mp_int_t ms = mp_obj_get_int(arg);
-    if (ms > 0) {
+    if (ms >= 0) {
         mp_hal_delay_ms(ms);
     }
     return mp_const_none;

Original file line number	Diff line number	Diff line change
`@@ -48,7 +48,7 @@ MP_DEFINE_CONST_FUN_OBJ_1(mp_utime_sleep_obj, time_sleep);`
`48`	`48`
`49`	`49`	`STATIC mp_obj_t time_sleep_ms(mp_obj_t arg) {`
`50`	`50`	`mp_int_t ms = mp_obj_get_int(arg);`
`51`		`- if (ms > 0) {`
	`51`	`+ if (ms >= 0) {`
`52`	`52`	`mp_hal_delay_ms(ms);`
`53`	`53`	`}`
`54`	`54`	`return mp_const_none;`