update xhash uses

include/picrin.h

@@ -86,16 +86,16 @@ typedef struct {
   pic_sym sADD, sSUB, sMUL, sDIV, sMINUS;
   pic_sym sEQ, sLT, sLE, sGT, sGE, sNOT;
 
-  xhash *syms;                  /* name to symbol */
-  xhash *sym_names;             /* symbol to name */
+  xhash syms;                   /* name to symbol */
+  xhash sym_names;              /* symbol to name */
   int sym_cnt;
   int uniq_sym_cnt;
 
-  xhash *global_tbl;
+  xhash global_tbl;
   pic_value *globals;
   size_t glen, gcapa;
 
-  xhash *macros;
+  xhash macros;
 
   pic_value lib_tbl;
   struct pic_lib *lib;

include/picrin/lib.h

@@ -13,7 +13,7 @@ struct pic_lib {
   PIC_OBJECT_HEADER
   pic_value name;
   struct pic_senv *senv;
-  xhash *exports;
+  xhash exports;
 };
 
 #define pic_lib_ptr(o) ((struct pic_lib *)pic_ptr(o))

include/picrin/macro.h

@@ -11,7 +11,7 @@ extern "C" {
 
 struct pic_senv {
   PIC_OBJECT_HEADER
-  xhash *renames;
+  xhash renames;
   struct pic_senv *up;
 };