Hook to allow iothread initialization.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

Index: qemu-iothread-4/vl.c
===================================================================
--- qemu-iothread-4.orig/vl.c
+++ qemu-iothread-4/vl.c
@@ -3682,6 +3682,10 @@ void qemu_cpu_kick(void *env)
     return;
 }
 
+static void qemu_init_main_loop(void)
+{
+}
+
 #ifdef _WIN32
 static void host_main_loop_wait(int *timeout)
 {
@@ -5106,6 +5110,7 @@ int main(int argc, char **argv, char **e
     if (smp_cpus > 1)
         kqemu_allowed = 0;
 #endif
+    qemu_init_main_loop();
     linux_boot = (kernel_filename != NULL);
     net_boot = (boot_devices_bitmap >> ('n' - 'a')) & 0xF;
 

--