[Fix] Fix processing of subject words

src/plugins/chartable.c

@@ -415,23 +415,23 @@ chartable_symbol_callback (struct rspamd_task *task, void *unused)
 				FALSE,
 				NULL);
 
-		if (words) {
+		if (words && words->len > 0) {
 			for (i = 0; i < words->len; i++) {
 				w = &g_array_index (words, rspamd_stat_token_t, i);
 				cur_score += rspamd_chartable_process_word_utf (task, w, FALSE);
 			}
-		}
 
-		cur_score /= (gdouble)part->normalized_words->len;
+			cur_score /= (gdouble)words->len;
 
-		if (cur_score > 2.0) {
-			cur_score = 2.0;
-		}
+			if (cur_score > 2.0) {
+				cur_score = 2.0;
+			}
 
-		if (cur_score > chartable_module_ctx->threshold) {
-			rspamd_task_insert_result (task, chartable_module_ctx->symbol,
-					cur_score, "subject");
+			if (cur_score > chartable_module_ctx->threshold) {
+				rspamd_task_insert_result (task, chartable_module_ctx->symbol,
+						cur_score, "subject");
 
+			}
 		}
 	}
 }