Fix uninitialised values for <i> and <dd>

Bug-Debian: https://github.com/tats/w3m/issues/16

file.c

@@ -4686,6 +4686,12 @@ HTMLtagproc1(struct parsed_tag *tag, struct html_feed_environ *h_env)
     case HTML_DD:
 	CLOSE_A;
 	CLOSE_DT;
+	if (h_env->envc == 0 ||
+	    (h_env->envc_real < h_env->nenv &&
+	     envs[h_env->envc].env != HTML_DL &&
+	     envs[h_env->envc].env != HTML_DL_COMPACT)) {
+	    PUSH_ENV(HTML_DL);
+	}
 	if (envs[h_env->envc].env == HTML_DL_COMPACT) {
 	    if (obuf->pos > envs[h_env->envc].indent)
 		flushline(h_env, obuf, envs[h_env->envc].indent, 0,

parsetagx.c

@@ -120,6 +120,7 @@ parse_tag(char **s, int internal)
     int i, attr_id = 0, nattr;
 
     /* Parse tag name */
+    tagname[0] = '\0';
     q = (*s) + 1;
     p = tagname;
     if (*q == '/') {