xbps-repo/index.c: fix warnings found by clang.

--HG--
extra : convert_revision : xtraeme%40gmail.com-20100428211333-wi7id42b9ol7g2ae

bin/xbps-repo/index.c

@@ -29,6 +29,7 @@
 #include <string.h>
 #include <errno.h>
 #include <dirent.h>
+#include <libgen.h>
 #include <sys/utsname.h>
 #include <sys/stat.h>
 
@@ -93,9 +94,6 @@ xbps_repo_addpkg_index(prop_dictionary_t idxdict, const char *filedir,
 	if (idxdict == NULL || file == NULL)
 		return EINVAL;
 
-	pkgname = version = regver = oldfilen = NULL;
-	sha256 = filen = tmpfilen = tmpstr = oldfilepath = NULL;
-
 	tmpfilen = strdup(file);
 	if (tmpfilen == NULL)
 		return errno;