wifi: fix blocking-delay oopsie

blockingDelay uses inverse logic; passed function should return false
when the condition is satisfied
only broken on 2.7.x, 3.x.x skips the check

code/espurna/system.cpp

@@ -306,13 +306,13 @@ namespace time {
 // plus, another helper when there are no external blocking checker
 
 bool tryDelay(CoreClock::time_point start, CoreClock::duration timeout, CoreClock::duration interval) {
-    auto expired = CoreClock::now() - start;
-    if (expired >= timeout) {
-        return true;
+    auto elapsed = CoreClock::now() - start;
+    if (elapsed < timeout) {
+        delay(std::min((timeout - elapsed), interval));
+        return false;
     }
 
-    delay(std::min((timeout - expired), interval));
-    return false;
+    return true;
 }
 
 void blockingDelay(CoreClock::duration timeout, CoreClock::duration interval) {

code/espurna/wifi.cpp

@@ -266,7 +266,7 @@ uint8_t opmode() {
 }
 
 void ensure_opmode(uint8_t mode) {
-    auto is_set = [&]() {
+    const auto is_set = [&]() {
         return (opmode() == mode);
     };
 
@@ -276,10 +276,13 @@ void ensure_opmode(uint8_t mode) {
 
     if (!is_set()) {
         wifi_set_opmode_current(mode);
+
         espurna::time::blockingDelay(
-                espurna::duration::Seconds(1),
-                espurna::duration::Milliseconds(10),
-                is_set);
+            espurna::duration::Seconds(1),
+            espurna::duration::Milliseconds(10),
+            [&]() {
+                return !is_set();
+            });
 
         if (!is_set()) {
             abort();