vl: Add a blank space between the variable and '='

Signed-off-by: NKewei Yu <keweihk@gmail.com>
Signed-off-by: NMichael Tokarev <mjt@tls.msk.ru>

vl.c

@@ -2925,7 +2925,7 @@ int main(int argc, char **argv, char **envp)
 
     bdrv_init_with_whitelist();
 
-    autostart= 1;
+    autostart = 1;
 
     /* first pass of option parsing */
     optind = 1;