ANSI C fixes.
Removed warnings.
Made the include files self-sufficient.
Some Solaris fixes.

diff --git a/windows/sysmetrics.c b/windows/sysmetrics.c
index d8d6006..fb6d9b0 100644
--- a/windows/sysmetrics.c
+++ b/windows/sysmetrics.c
@@ -12,6 +12,7 @@
 #include "winuser.h"
 #include "monitor.h"
 #include "options.h"
+#include "sysmetrics.h"
 #include "tweak.h"
 
 static short sysMetrics[SM_CMETRICS+1];