Revert "System: Fastboot: warning fixit, misc bugs and cleanup."

This reverts commit 782111b3bc5d372afc8d66ab6023e834b7c23b88.

Change-Id: Ib66400dfaeef7f01e6461a57b9f09be08de2f1fe
diff --git a/fastboot/usbtest.c b/fastboot/usbtest.c
index 488db06..b8fb9e2 100644
--- a/fastboot/usbtest.c
+++ b/fastboot/usbtest.c
@@ -35,8 +35,8 @@
 
 #include "usb.h"
 
-static int arg_size = 4096;
-static int arg_count = 4096;
+static unsigned arg_size = 4096;
+static unsigned arg_count = 4096;
 
 long long NOW(void)
 {
@@ -134,7 +134,7 @@
     { "send", match_null, test_null, "send to null interface" },
     { "recv", match_zero, test_zero, "recv from zero interface" },
     { "loop", match_loop, 0,         "exercise loopback interface" },
-    { NULL, NULL, NULL, NULL },
+    {},
 };
 
 int usage(void)