am: fix patch format detection for Thunderbird "Save As" emails

diff --git a/config.mak.in b/config.mak.in
index dd6045131880111bb09306cb3e48330a0e5acdac..67b12f73a1bb795207082973701ece8009167f1c 100644 (file)
--- a/config.mak.in
+++ b/config.mak.in
@@ -34,6 +34,7 @@ NO_LIBGEN_H=@NO_LIBGEN_H@
 NEEDS_LIBICONV=@NEEDS_LIBICONV@
 NEEDS_SOCKET=@NEEDS_SOCKET@
 NEEDS_RESOLV=@NEEDS_RESOLV@
+NEEDS_LIBGEN=@NEEDS_LIBGEN@
 NO_SYS_SELECT_H=@NO_SYS_SELECT_H@
 NO_D_INO_IN_DIRENT=@NO_D_INO_IN_DIRENT@
 NO_D_TYPE_IN_DIRENT=@NO_D_TYPE_IN_DIRENT@