libsubid/api.c: make shadow_logfd not extern

Closes #346

Also #include stdio.h

Signed-off-by: Serge Hallyn <serge@hallyn.com>

libsubid/api.c

@@ -40,7 +40,7 @@
 #include "subid.h"
 
 const char *Prog = "(libsubid)";
-extern FILE * shadow_logfd;
+FILE *shadow_logfd;
 
 bool libsubid_init(const char *progname, FILE * logfd)
 {

libsubid/subid.h

@@ -1,4 +1,5 @@
 #include <sys/types.h>
+#include <stdio.h>
 #include <stdbool.h>
 
 #ifndef SUBID_RANGE_DEFINED