pack.c: reduce dispatch in `pack_unpack()`.

mrbgems/mruby-pack/src/pack.c

@@ -1501,26 +1501,24 @@ pack_unpack(mrb_state *mrb, mrb_value str, int single)
       continue;
     }
 
-    if (flags & PACK_FLAG_COUNT2) {
     sptr = (const unsigned char *)RSTRING_PTR(str) + srcidx;
     switch (dir) {
     case PACK_DIR_HEX:
       srcidx += unpack_h(mrb, sptr, srclen - srcidx, result, count, flags);
-        break;
+      continue;
     case PACK_DIR_STR:
       srcidx += unpack_a(mrb, sptr, srclen - srcidx, result, count, flags);
-        break;
+      continue;
     case PACK_DIR_BASE64:
       srcidx += unpack_m(mrb, sptr, srclen - srcidx, result);
+      continue;
       break;
     case PACK_DIR_QENC:
       srcidx += unpack_M(mrb, sptr, srclen - srcidx, result);
-        break;
+      continue;
     default:
       break;
     }
-      continue;
-    }
 
     while (count != 0) {
       if (srclen - srcidx < size) {