Compile time error on 5.1.3

I'm attempting to compile 5.1.3 on a MinGW platform and I get the following:

In file included from ./libdrizzle/common.h:55:0,
                 from libdrizzle/command.cc:46:
./libdrizzle/windows.hpp: In function 'int translate_windows_error()':
./libdrizzle/windows.hpp:85:18: error: 'EINPROGRESS' was not declared in this scope
./libdrizzle/windows.hpp:93:18: error: 'ECONNREFUSED' was not declared in this scope
./libdrizzle/windows.hpp:97:18: error: 'ENETUNREACH' was not declared in this scope
./libdrizzle/windows.hpp:101:18: error: 'ETIMEDOUT' was not declared in this scope
./libdrizzle/windows.hpp:105:18: error: 'ECONNRESET' was not declared in this scope
./libdrizzle/windows.hpp:109:18: error: 'EADDRINUSE' was not declared in this scope
./libdrizzle/windows.hpp:113:18: error: 'EOPNOTSUPP' was not declared in this scope
./libdrizzle/windows.hpp:117:18: error: 'ENOPROTOOPT' was not declared in this scope
make[1]: *** [libdrizzle/libdrizzle_libdrizzle_la-command.lo] Error 1
make[1]: Leaving directory `/home/backuppc/schematic/libdrizzle-5.1.3'
make: *** [all] Error 2

I read that a patch to solve this was supposed to have been merged. Do the patches still need to be merged? I honestly haven't been able to dig any further as I've been tied up in other fires but it would be nice to get a fix for this one.

In addition to 5.1.3 I've also retrieved the latest code from the codestore in the chance that patches have been applied and not released as a tar.gz file. It too exhibits the above output.

Mark