fix: enforce minimum heating setpoint during freeze protection

src/RegulatorTask.h

@@ -245,8 +245,11 @@ protected:
     }
 
     // If freezing, set temperature to no lower than low temp provided by freeze protection
-    if (vars.master.heating.freezing && fabsf(settings.heating.freezeProtection.lowTemp - newTemp) < 0.0001f) {
-      newTemp = settings.heating.freezeProtection.lowTemp;
+    if (vars.master.heating.freezing) {
+      newTemp = fmaxf(
+        newTemp,
+        static_cast<float>(settings.heating.freezeProtection.lowTemp)
+      );
     }
 
     return newTemp;