why would pos ever be negative?

CMakeLists.txt

@@ -52,6 +52,7 @@ endif()
 
 if(WIN32)
 add_compile_options($<$<COMPILE_LANGUAGE:C>:-Wno-bad-function-cast>)
+add_compile_options(-Wno-cast-function-type)
 set(FS_LIB stdc++fs)
 endif(WIN32)
 

llarp/dnsc.cpp

@@ -299,7 +299,7 @@ generic_handle_dnsc_recvfrom(dnsc_answer_request *request,
       llarp::LogDebug("Read an authority for ",
                      request->question.name, " at ", std::to_string(pos));
     // castBuf += answer->name.length() + 4 + 4 + 4 + answer->rdLen;
-      if(pos > sz)
+      if((ssize_t)pos > sz)
       {
           llarp::LogWarn("Would read past end of dns packet. for ",
                          request->question.name);