added new files to po/POTFILES.in

diff --git a/po/POTFILES.in b/po/POTFILES.in
index 44d1148..9a38202 100755 (executable)
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -1,4 +1,7 @@
 backend.c
+book.c
+engineoutput.c
+filebrowser/selfile.c
 xboard.c
 xedittags.c
 xengineoutput.c