usleep() did not work on Windows - modified ag.cc to use Sleep()

git-svn-id: svn://anubis/anaglym/trunk@38 99a6e188-d820-4881-8870-2d33a10e2619

ag.cc

@@ -10,6 +10,9 @@
 #include <string>
 #include <GL/gl.h>
 #include <GL/glu.h>
+#ifdef _WIN32
+#include <windows.h>                /* Sleep() */
+#endif
 using namespace std;
 
 namespace ag
@@ -157,7 +160,11 @@ namespace ag
             if (lua_type(L, -1) == LUA_TNUMBER)
             {
                 double seconds = lua_tonumber(L, -1);
+#ifdef _WIN32
+                Sleep((DWORD)(seconds * 1000));
+#else
                 usleep((useconds_t) (seconds * 1000000));
+#endif
             }
         }