Split error macro into two versions (format vs non-formating) to allow format checking at compile-time

src/Nazara/Network/Posix/IpAddressImpl.cpp

@@ -178,12 +178,12 @@ namespace Nz
 				}
 
 				default:
-					NazaraInternalError("Unhandled ip protocol ({0:#x})", UnderlyingCast(ipAddress.GetProtocol()));
+					NazaraInternalErrorFmt("unhandled ip protocol ({0:#x})", UnderlyingCast(ipAddress.GetProtocol()));
 					break;
 			}
 		}
 
-		NazaraError("Invalid ip address");
+		NazaraError("invalid ip address");
 		return 0;
 	}