Merge pull request jordansissel#343 from barn/epoch_of_zero

Make RPM cope with an input epoch of zero.

lib/fpm/package/rpm.rb

@@ -271,6 +271,7 @@ def build_sub_dir
   # with fpm 0.4.3 and older)
   def epoch
     return 1 if @epoch.nil?
+    return @epoch if @epoch.is_a?(Numeric)
     return nil if @epoch.empty?
     return @epoch
   end # def epoch

spec/fpm/package/rpm_spec.rb

@@ -42,6 +42,10 @@
     it "should default to 1" do
       insist { subject.epoch.to_s } == "1"
     end
+    it "should cope with it being zero" do
+      subject.epoch = 0
+      insist { subject.epoch.to_s } == "0"
+    end
   end
 
   describe "#to_s" do
@@ -57,6 +61,7 @@
     end
   end
 
+
   describe "#templating" do
     context "default user and group" do
       before :all do