auto-detect msys instead of requiring users to tell our build system about it

Modified: trunk/reactos/Makefile

--- trunk/reactos/Makefile	2005-11-26 02:12:58 UTC (rev 19599)
+++ trunk/reactos/Makefile	2005-11-26 02:23:07 UTC (rev 19600)
@@ -115,7 +115,8 @@

 
 ifeq ($(HOST),)
 ifeq ($(word 1,$(shell gcc -dumpmachine)),mingw32)

-ifeq ($(OSTYPE),msys)

+ifeq ($(findstring msys,$(-shell sh --version)),msys)
+export OSTYPE = msys

 HOST=mingw32-linux
 else
 HOST=mingw32-windows