patch 7.4.992
Problem:    Makefiles for MS-Windows in src/po are outdated.
Solution:   Make them work. (Ken Takata, Taro Muraoka)
diff --git a/src/po/README_mingw.txt b/src/po/README_mingw.txt
index 939a8f0..8052082 100644
--- a/src/po/README_mingw.txt
+++ b/src/po/README_mingw.txt
@@ -86,6 +86,9 @@
 
     This will create the xx\LC_MESSAGES directory (if it does not exist) and
     will copy vim.po to it.
+    You can also use the following command to install all languages:
+
+	make -f Make_ming.mak install-all
 
 (6) Another extra step ;-)). The command: