Fix problems on Fedora 19 and 21.

Glusterfs on Fedora 19 seems to be old and as such does not allow us to
build the gfapi-fd plugin. As Fedora 19 is not supported anyway it makes
little sense to add a lot of work to make the gluster stuff work on that
platform.

On Fedora 21 it seems the compile flags are more strict which leads to
the following error:

tray-monitor.cpp:65:32: error: format not a string literal and no format
arguments [-Werror=format-security]

platforms/packaging/bareos.spec

@@ -114,8 +114,10 @@ Vendor: 	The Bareos Team
 
 %if 0%{?rhel_version} >= 700 || 0%{?centos_version} >= 700 || 0%{?fedora_version} >= 19
 %define systemd_support 1
+%if 0%{?fedora_version} != 19
 %define glusterfs 1
 %endif
+%endif
 
 %if 0%{?rhel_version} >= 700
 %define ceph 1

src/qt-tray-monitor/tray-monitor.cpp

@@ -62,9 +62,8 @@ static void usage()
 #if HAVE_WIN32
    QMessageBox::information(0, "Help", out);
 #else
-   fprintf(stderr, out.toUtf8());
+   fprintf(stderr, "%s", out.toUtf8());
 #endif
-
 }
 
 static void parse_command_line(int argc, char* argv[], cl_opts& cl)