Skip unused value in tokenizer code

In the case of an escape character, c is never read. tok_next() is
used to advance the pointer.

CID 1225097

Parser/tokenizer.c

@@ -1737,7 +1737,7 @@ tok_get(struct tok_state *tok, char **p_start, char **p_end)
             else {
                 end_quote_size = 0;
                 if (c == '\\')
-                    c = tok_nextc(tok);  /* skip escaped char */
+                    tok_nextc(tok);  /* skip escaped char */
             }
         }