Silence a warning.

sys/dev/vinum/vinumparser.c

@@ -76,6 +76,7 @@
 #include <ctype.h>
 #include <errno.h>
 #include <fcntl.h>
+#include <string.h>
 #define iswhite isspace					    /* use the ctype macro */
 #endif
 

sys/dev/vinum/vinumutil.c

@@ -45,6 +45,7 @@
 #include <dev/vinum/statetexts.h>
 #ifndef _KERNEL
 #include <stdio.h>
+#include <string.h>
 extern jmp_buf command_fail;				    /* return on a failed command */
 #endif