unix/coverage: Cast type names to qstr explicitly.

Signed-off-by: Jeff Epler <[email protected]>

Author: jepler

ports/unix/coverage.c

@@ -218,7 +218,7 @@ static mp_obj_t extra_coverage(void) {
         }
         mp_printf(&mp_plat_print, "%p\n", (void *)0x789f); // pointer
         mp_printf(&mp_plat_print, "%P\n", (void *)0x789f); // pointer uppercase
-        mp_printf(&mp_plat_print, "%.2s %.3s '%4.4s' '%5.5q' '%.3q'\n", "abc", "abc", "abc", MP_QSTR_True, MP_QSTR_True); // fixed string precision
+        mp_printf(&mp_plat_print, "%.2s %.3s '%4.4s' '%5.5q' '%.3q'\n", "abc", "abc", "abc", (qstr)MP_QSTR_True, (qstr)MP_QSTR_True); // fixed string precision
         mp_printf(&mp_plat_print, "%.*s\n", -1, "abc"); // negative string precision
         mp_printf(&mp_plat_print, "%b %b\n", 0, 1); // bools
         #ifndef NDEBUG