Chore (Haiku): silence compiler warnings

src/common/netif/netif_haiku.c

@@ -24,10 +24,10 @@ bool ffNetifGetDefaultRouteImpl(char iface[IF_NAMESIZE + 1], uint32_t* ifIndex)
         return false;
 
     int size = config.ifc_value;
-    if (size == 0)
+    if (size <= 0)
         return false;
 
-    FF_AUTO_FREE void *buffer = malloc(size);
+    FF_AUTO_FREE void *buffer = malloc((size_t) size);
     if (buffer == NULL) {
         return false;
     }

src/detection/battery/battery_haiku.c

@@ -44,7 +44,7 @@ const char* parseBattery(int dfd, const char* battId, FFlist* results)
     return NULL;
 }
 
-const char* ffDetectBattery(FFBatteryOptions* options, FFlist* results)
+const char* ffDetectBattery(FF_MAYBE_UNUSED FFBatteryOptions* options, FFlist* results)
 {
     FF_AUTO_CLOSE_DIR DIR* dir = opendir("/dev/power/acpi_battery/");
     if (!dir) return "opendir(/dev/power/acpi_battery) failed";