the 'mumble-0.9.4_missing-typdefs.patch' for mumble-0.9.4 has become obsolete, because the typedefs it adds to the sources are already included in speex-1.1.12 (stable at least on x86). so, the patch should be removed, and mumble (and murmur) should depend on >=speex-1.1.12 (or else building mumble with speex-1.1.12 will fail with a conflicting typedef error...)
In CVS, thanks