[PRISM] Use xcalloc for iseq id table

We use xfree on the other end, so we need to use a form of xmalloc here.

Co-authored-by: Matthew Draper <matthew@trebex.net>

prism_compile.c

@@ -4663,7 +4663,7 @@ pm_compile_node(rb_iseq_t *iseq, const pm_node_t *node, LINK_ANCHOR *const ret,
             const VALUE default_values = rb_ary_hidden_new(1);
             const VALUE complex_mark = rb_str_tmp_new(0);
 
-            ID *ids = calloc(keywords_list->size, sizeof(ID));
+            ID *ids = xcalloc(keywords_list->size, sizeof(ID));
 
             for (size_t i = 0; i < keywords_list->size; i++, local_index++) {
                 pm_node_t *keyword_parameter_node = keywords_list->nodes[i];