Added a `make manual' target.

Makefile.am

@@ -172,6 +172,11 @@ if MANUALUPDATE
 endif
 endif
 
+if MANUALUPDATE
+manual:
+	@cd doc/manual && make html || exit $?
+endif
+
 # latest graph-includes.pl can be found currently at http://ydirson.free.fr/soft/wesnoth/graphs/
 wesnoth-deps.dot:
 	PERL5LIB=$(top_srcdir) graph-includes -verbose --class wesnoth --consolidate 1-1 \

doc/manual/Makefile.am

@@ -22,7 +22,7 @@ update-po4a: manual.en.xml
 	( cd ../../po/wesnoth-manual && \
 	  $(PO4A) $(PO4AOPTS) wesnoth-manual.cfg || exit $? )
 
-dist-hook: update-po4a
+html: update-po4a
 	@for i in manual.*.xml; do \
 		lang=$$(echo $$i | sed -e 's/manual\.\([a-zA-Z_@]*\)\.xml/\1/'); \
 		echo "Generating manual from manual.$$lang.xml..."; \
@@ -31,6 +31,8 @@ dist-hook: update-po4a
 		            "manual.$$lang.xml" > "manual.$$lang.html"; \
 	done
 
+dist-hook: html
+
 clean-local:
 	rm -f *.xml
 endif