Added flag which forces the printing of hexes

Anything other than char (which can just use print.byte to print the
hex) and byte (which prints hexes anyway), all other types may be
forced to print a hex rather than a number if PRINT_HEX is 1.

vm/runtime.c

@@ -195,18 +195,42 @@ err_t vm_execute(vm_t *vm)
       printf("0x%x", datum.as_byte);
       break;
     case TYPE_INT: {
-      printf("%" PRId32, datum.as_int);
+      printf(
+#if PRINT_HEX == 1
+          "0x%X",
+#else
+          "%" PRId32,
+#endif
+          datum.as_int);
       break;
     }
     case TYPE_HWORD:
-      printf("%" PRIu32, datum.as_hword);
+      printf(
+#if PRINT_HEX == 1
+          "0x%X",
+#else
+          "%" PRIu32,
+#endif
+          datum.as_hword);
       break;
     case TYPE_LONG: {
-      printf("%" PRId64, datum.as_long);
+      printf(
+#if PRINT_HEX == 1
+          "0x%dX",
+#else
+          "%" PRId64,
+#endif
+          datum.as_long);
       break;
     }
     case TYPE_WORD:
-      printf("%" PRIu64, datum.as_word);
+      printf(
+#if PRINT_HEX == 1
+          "0x%lX",
+#else
+          "%" PRIu64,
+#endif
+          datum.as_word);
       break;
     }