Chore: silence compiler warnings

Author: CarterLi

src/common/netif/netif_linux.c

@@ -130,8 +130,7 @@ bool ffNetifGetDefaultRouteImplV4(FFNetifDefaultRouteResult* result)
             }
 
             if (nlh->nlmsg_type == NLMSG_ERROR) {
-                struct nlmsgerr* err = (struct nlmsgerr*)NLMSG_DATA(nlh);
-                FF_DEBUG("Netlink reports error: %s", strerror(-err->error));
+                FF_DEBUG("Netlink reports error: %s", strerror(-((struct nlmsgerr*)NLMSG_DATA(nlh))->error));
                 continue;
             }
 
@@ -340,8 +339,7 @@ bool ffNetifGetDefaultRouteImplV6(FFNetifDefaultRouteResult* result)
             }
 
             if (nlh->nlmsg_type == NLMSG_ERROR) {
-                struct nlmsgerr* err = (struct nlmsgerr*)NLMSG_DATA(nlh);
-                FF_DEBUG("Netlink reports error: %s", strerror(-err->error));
+                FF_DEBUG("Netlink reports error: %s", strerror(-((struct nlmsgerr*)NLMSG_DATA(nlh))->error));
                 continue;
             }
 

src/detection/gpu/gpu_windows.c

@@ -40,7 +40,7 @@ const char* ffDetectGPUImpl(FF_MAYBE_UNUSED const FFGPUOptions* options, FFlist*
         return "CM_Get_Device_ID_ListW failed";
     }
 
-    int deviceCount = 0;
+    FF_MAYBE_UNUSED int deviceCount = 0;
     for (wchar_t* devId = devIdList; *devId; devId += wcslen(devId) + 1)
     {
         FF_DEBUG("Processing device ID: %ls", devId);

src/detection/localip/localip_windows.c

@@ -74,8 +74,7 @@ const char* ffDetectLocalIps(const FFLocalIpOptions* options, FFlist* results)
         }
     }
 
-    int adapterCount = 0;
-    int processedCount = 0;
+    FF_MAYBE_UNUSED int adapterCount = 0, processedCount = 0;
 
     // Iterate through all of the adapters
     for (IP_ADAPTER_ADDRESSES* adapter = adapter_addresses; adapter; adapter = adapter->Next)
@@ -137,7 +136,7 @@ const char* ffDetectLocalIps(const FFLocalIpOptions* options, FFlist* results)
         uint32_t typesToAdd = options->showType & (FF_LOCALIP_TYPE_IPV4_BIT | FF_LOCALIP_TYPE_IPV6_BIT | FF_LOCALIP_TYPE_ALL_IPS_BIT);
         FF_DEBUG("Types to add for adapter %u: 0x%X", (unsigned)adapter->IfIndex, typesToAdd);
 
-        int ipv4Count = 0, ipv6Count = 0;
+        FF_MAYBE_UNUSED int ipv4Count = 0, ipv6Count = 0;
 
         for (IP_ADAPTER_UNICAST_ADDRESS* ifa = adapter->FirstUnicastAddress; ifa; ifa = ifa->Next)
         {