Making optional use of statvfs() in sg-dummy

libburn/sg-dummy.c

@@ -20,6 +20,10 @@ Present implementation: default dummy which enables libburn only to work
 #include <sys/stat.h>
 #include <string.h>
 
+#ifdef Libburn_os_has_statvfS
+#include <sys/statvfs.h>
+#endif /* Libburn_os_has_stavtfS */
+
 #include "transport.h"
 #include "drive.h"
 #include "sg.h"
@@ -34,7 +38,6 @@ Present implementation: default dummy which enables libburn only to work
 extern struct libdax_msgs *libdax_messenger;
 
 
-
 /** Returns the next index number and the next enumerated drive address.
     The enumeration has to cover all available and accessible drives. It is
     allowed to return addresses of drives which are not available but under
@@ -165,7 +168,6 @@ int burn_os_stdio_capacity(char *path, off_t *bytes)
 
 #ifdef Libburn_os_has_statvfS
 	struct statvfs vfsbuf;
-	int open_mode = O_RDONLY, fd, ret;
 #endif
 
 	char testpath[4096], *cpt;