[gitg] Avoid empty css files

[Alberto Fanjul <albfan src gnome org>]

commit 92e8b11b2175b70733356a3899606fde37e1478c
Author: Alberto Fanjul <albertofanjul gmail com>
Date:   Sun Oct 14 21:59:08 2018 +0200

    Avoid empty css files

 gitg/resources/ui/style-osx.css   | 2 ++
 gitg/resources/ui/style-unix.css  | 1 +
 gitg/resources/ui/style-win32.css | 1 +
 3 files changed, 4 insertions(+)
---
diff --git a/gitg/resources/ui/style-osx.css b/gitg/resources/ui/style-osx.css
index 6ff3fb5f..9a0adcfb 100644
--- a/gitg/resources/ui/style-osx.css
+++ b/gitg/resources/ui/style-osx.css
@@ -1,3 +1,5 @@
+/* osx css styles */
+
 .monospace {
        font: menlo;
 }
diff --git a/gitg/resources/ui/style-unix.css b/gitg/resources/ui/style-unix.css
index e69de29b..e67de545 100644
--- a/gitg/resources/ui/style-unix.css
+++ b/gitg/resources/ui/style-unix.css
@@ -0,0 +1 @@
+/* unix styles */
diff --git a/gitg/resources/ui/style-win32.css b/gitg/resources/ui/style-win32.css
index e69de29b..321553bd 100644
--- a/gitg/resources/ui/style-win32.css
+++ b/gitg/resources/ui/style-win32.css
@@ -0,0 +1 @@
+/* win32 css styles */