[banshee/stable-2.4] build: Don't run update-desktop-database in an empty folder

[Bertrand Lorentz <blorentz src gnome org>]

commit 2941cc5f24328d1f1d75d85d4723cab9e2f4fee6
Author: Bertrand Lorentz <bertrand lorentz gmail com>
Date:   Thu May 31 23:01:28 2012 +0200

    build: Don't run update-desktop-database in an empty folder
    
    During "make distcheck", update-desktop-database creates a cache file
    which we have no reasonable way to remove. This left-over file now
    breaks distcheck with recent automake versions.
    
    We now only run update-desktop-database if DESTDIR is not set and if
    there's already default mime-types in the target folder. That means it
    will not be run when doing "make install" into an empty folder.

 data/desktop-files/Makefile.am |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/data/desktop-files/Makefile.am b/data/desktop-files/Makefile.am
index a59c40d..012099e 100644
--- a/data/desktop-files/Makefile.am
+++ b/data/desktop-files/Makefile.am
@@ -17,6 +17,7 @@ endif
 @INTLTOOL_DESKTOP_RULE@
 
 install-data-hook:
+	test -f $(DESTDIR)$(datadir)/applications/defaults.list && \
 	test -z $(DESTDIR) && update-desktop-database $(DESTDIR)$(datadir)/applications || :
 
 EXTRA_DIST = \