Fix a UMR, one of many where the SECItem type field was uninitialized.

bug 39483.  Also, eliminate a warning about calling an undeclared function
by including the header file.

security/nss/lib/certhigh/certhigh.c

@@ -38,6 +38,7 @@
 #include "certdb.h"
 #include "certt.h"
 #include "cert.h"
+#include "certxutl.h"
 
 /*
  * Find all user certificates that match the given criteria.
@@ -511,6 +512,7 @@ CollectDistNames( CERTCertificate *cert, SECItem *k, void *data)
 
 	/* copy the name */
 	node->name.len = len = cert->derSubject.len;
+	node->name.type = siBuffer;
 	node->name.data = (unsigned char*)PORT_ArenaAlloc(names->arena, len);
 	if ( node->name.data == NULL ) {
 	    return(SECFailure);