qtest: Fix more format errors with qtest_sendf

After adding GCC_FMT_ATTR to qtest_sendf, more format errors are reported
by the compiler. These are fixed here.

Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

tests/libqtest.c

diff --git a/tests/libqtest.c b/tests/libqtest.c
index 1ce6fa1..295c6d4 100644
--- a/tests/libqtest.c
+++ b/tests/libqtest.c
@@ -26,6 +26,7 @@
 #include <unistd.h>
 #include <string.h>
 
+#include "compiler.h"
 #include "osdep.h"
 
 #define MAX_IRQ 256
@@ -130,7 +131,7 @@
     }
 }
 
-static void qtest_sendf(QTestState *s, const char *fmt, ...)
+static void GCC_FMT_ATTR(2, 3) qtest_sendf(QTestState *s, const char *fmt, ...)
 {
     va_list ap;
     gchar *str;
@@ -356,7 +357,7 @@
     gchar **args;
     size_t i;
 
-    qtest_sendf(s, "read 0x%" PRIx64 " 0x%x\n", addr, size);
+    qtest_sendf(s, "read 0x%" PRIx64 " 0x%zx\n", addr, size);
     args = qtest_rsp(s, 2);
 
     for (i = 0; i < size; i++) {
@@ -378,7 +379,7 @@
     const uint8_t *ptr = data;
     size_t i;
 
-    qtest_sendf(s, "write 0x%" PRIx64 " 0x%x 0x", addr, size);
+    qtest_sendf(s, "write 0x%" PRIx64 " 0x%zx 0x", addr, size);
     for (i = 0; i < size; i++) {
         qtest_sendf(s, "%02x", ptr[i]);
     }