[PATCH] doc: Quell warnings about missing man3 directory before its been built

[Bryce W. Harrington]

The shell command for dist_man3_MANS gets invoked several times during
the make process but before the man pages have been generated, which
causes the following warnings when running `make`:

    find: `man/man3': No such file or directory
    find: `man/man3': No such file or directory
    find: `man/man3': No such file or directory
      GEN    xml/client/index.xml

Despite these error messages, the generated dist tarball contains the
man3 pages as intended, both before and after this patch.

    $ make dist
    $ tar xxf wayland-1.5.90.tar.xz
    $ find wayland-1.5.90/doc/doxygen/man/man3 -name "wl_*.3" | wc -l
    85

Signed-off-by: Bryce Harrington <b.harrington at samsung.com>
---
 doc/doxygen/Makefile.am |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/doc/doxygen/Makefile.am b/doc/doxygen/Makefile.am
index de3b31f..83622af 100644
--- a/doc/doxygen/Makefile.am
+++ b/doc/doxygen/Makefile.am
@@ -20,7 +20,7 @@ scanned_src_files_server = 				\
 # find all man/man3/wl_foo.3 pages
 # for this to work, we need to create them before the man target (hence
 # all-local below)
-dist_man3_MANS= $(shell find man/man3/ -name "wl_*.3" -printf "man/man3/%P\n")
+dist_man3_MANS = $(shell test -d man && find man/man3 -name "wl_*.3" -printf "man/man3/%P\n")
 
 xml/client/index.xml: $(scanned_src_files_client) wayland.doxygen
 	$(AM_V_GEN)$(MKDIR_P) xml/client && \
-- 
1.7.9.5