bitbake: toaster: base Only show New Build button when there are > 0 projects

Only show new build button if we have defined at least one project as we
can't select a project to build against if there are no projects created
yet.

(Bitbake rev: 6daada59ee846c4e957bba3574dc262a0c79854d)

Signed-off-by: Michael Wood <michael.g.wood@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/toaster/toastergui/templates/base.html

@@ -31,6 +31,7 @@
     ctx.projectBuildUrl = "{% url 'xhr_build' %}";
     ctx.projectPageUrl = "{% url 'project' %}";
     ctx.projectInfoUrl = "{% url 'xhr_projectinfo' %}";
+    ctx.numProjects = {{projects|length}};
     {% if project %}
       ctx.projectId = {{project.id}};
     {% endif %}