Apply by doing:
	cd /usr/src/usr.sbin/kvm_mkdb
	patch < kvm_mkdb.patch

make && make install

Index: nlist.c
===================================================================
RCS file: /cvs/src/usr.sbin/kvm_mkdb/nlist.c,v
retrieving revision 1.14
retrieving revision 1.15
diff -u -r1.14 -r1.15
--- nlist.c	1998/09/26 07:16:23	1.14
+++ nlist.c	1998/10/28 23:20:01	1.15
@@ -96,7 +96,7 @@
 	int nr, strsize;
 	size_t len;
 	u_long kerntextoff;
-	size_t snamesize;
+	size_t snamesize = 0;
 	char *strtab, buf[1024], *sname, *p;
 
 	/* Read in exec structure. */
