Resolve MSVC warnings:

src\sbbs3\js_global.c(3703): warning C4018: '<': signed/unsigned mismatch
src\sbbs3\js_global.c(3761): warning C4018: '<': signed/unsigned mismatch
src\sbbs3\js_global.c(3779): warning C4018: '<': signed/unsigned mismatch

src/sbbs3/js_global.c

@@ -3668,7 +3668,7 @@ js_socket_select(JSContext *cx, uintN argc, jsval *arglist)
 {
 	jsval *argv=JS_ARGV(cx, arglist);
 	JSObject*	inarray[3]={NULL, NULL, NULL};
-	int		inarray_cnt = 0;
+	jsuint		inarray_cnt = 0;
 	JSObject*	robj;
 	JSObject*	rarray;
 	BOOL		poll_for_write=FALSE;