dvdauthor: fix build with gettext 0.25

pkgs/by-name/dv/dvdauthor/gettext-0.25.patch

···
+diff --git a/configure.ac b/configure.ac
+index f4b270f..17e102f 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -1,5 +1,9 @@
+ AC_INIT(DVDAuthor,0.7.2,[e-mail])
+ 
++AC_CONFIG_MACRO_DIRS([m4])
++AM_GNU_GETTEXT_VERSION([0.25])
++AM_GNU_GETTEXT([external])
++
+ AC_CONFIG_HEADERS(src/config.h)
+ AC_CONFIG_AUX_DIR(autotools)
+ 

pkgs/by-name/dv/dvdauthor/package.nix

···
       url = "https://github.com/ldo/dvdauthor/commit/45705ece5ec5d7d6b9ab3e7a68194796a398e855.patch?full_index=1";
       hash = "sha256-tykCr2Axc1qhUvjlGyXQ6X+HwzuFTm5Va2gjGlOlSH0=";
     })
+    ./gettext-0.25.patch
   ];
 
   buildInputs = [