Fix most warnings (errors with -Werror) when debugging is enabled

I used the following command to enable debugging:
perl -p -i -e 's/^\/\/#define DEBUG/#define DEBUG/g' * */* */*/*

Signed-off-by: Blue Swirl <blauwirbel@gmail.com>

qemu-tool.c

@@ -15,11 +15,14 @@
 #include "monitor.h"
 #include "sysemu.h"
 #include "qemu-timer.h"
+#include "qemu-log.h"
 
 #include <sys/time.h>
 
 QEMUClock *rt_clock;
 
+FILE *logfile;
+
 struct QEMUBH
 {
     QEMUBHFunc *cb;