[gcompris] Better documenting windows build

[Bruno Coudoin <bcoudoin src gnome org>]

commit 5f71506ed1124ed0e1457fcd1e6d90c140e1e532
Author: Bruno Coudoin <bruno coudoin free fr>
Date:   Sun Oct 11 13:32:40 2009 +0200

    Better documenting windows build

 README.mingw |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/README.mingw b/README.mingw
index 550862c..7a38b08 100644
--- a/README.mingw
+++ b/README.mingw
@@ -60,7 +60,8 @@ be provided and where.
 
 3: BUILDING GCOMPRIS.EXE
 ========================
-* On GNU/Linux run make install to install the translations.
+* On GNU/Linux run make install to install the translations then:
+  make -f Makefile.mingw svg2png - Until we have svg support on Windows
   make -f Makefile.mingw prep - create the win32-install-dir
   make -f Makefile.mingw  - compilation step
   make -f Makefile.mingw  prepack - include all necessary libraries in the installer directory