libdpkg: Make statusfile and availablefile variables static

lib/dpkg/dbmodify.c

@@ -45,9 +45,8 @@
 #include <dpkg/dir.h>
 #include <dpkg/triglib.h>
 
-char *statusfile=NULL, *availablefile=NULL;
-
 static enum modstatdb_rw cstatus=-1, cflags=0;
+static char *statusfile, *availablefile;
 static char *importanttmpfile=NULL;
 static FILE *importanttmp;
 static int nextupdate;

lib/dpkg/dpkg-db.h

@@ -208,9 +208,6 @@ void modstatdb_note_ifwrite(struct pkginfo *pkg);
 void modstatdb_checkpoint(void);
 void modstatdb_shutdown(void);
 
-/* Initialised by modstatdb_init. */
-extern char *statusfile, *availablefile;
-
 const char *pkgadmindir(void);
 const char *pkgadminfile(struct pkginfo *pkg, const char *whichfile);