Unknown origin for the bundled 3rdparty/libuemf
Commit 75da9ac4 would have us believe that libuemf 0.2.6 is used for the copy-pasted sources under 3rdparty/libuemf, but that doesn't seem to be the case because it contains files such as 'symbol_convert.h' which Inkscape uses that aren't in the 0.2.6 release of libUEMF (see: https://sourceforge.net/projects/libuemf/files/libUEMF-0.2.6.tar.gz/download).
As suggested in issue #876, I'd suggest using git submodules for bundled libraries (and if bundling them is really necessary) to improve traceability.