py: Rename MP_QSTR_NULL to MP_QSTRnull to avoid intern collisions.

Fixes #5140.

1 files changed, 2 insertions, 2 deletions

diff --git a/py/qstr.h b/py/qstr.h
index f4375ee0e..8153ef29f 100644
--- a/py/qstr.h
+++ b/py/qstr.h
@@ -35,7 +35,7 @@
 // Note: it would be possible to define MP_QSTR_xxx as qstr_from_str_static("xxx")
 // for qstrs that are referenced this way, but you don't want to have them in ROM.
 
-// first entry in enum will be MP_QSTR_NULL=0, which indicates invalid/no qstr
+// first entry in enum will be MP_QSTRnull=0, which indicates invalid/no qstr
 enum {
 #ifndef NO_QSTR
 #define QDEF(id, str) id,
@@ -61,7 +61,7 @@ typedef struct _qstr_pool_t {
 void qstr_init(void);
 
 mp_uint_t qstr_compute_hash(const byte *data, size_t len);
-qstr qstr_find_strn(const char *str, size_t str_len); // returns MP_QSTR_NULL if not found
+qstr qstr_find_strn(const char *str, size_t str_len); // returns MP_QSTRnull if not found
 
 qstr qstr_from_str(const char *str);
 qstr qstr_from_strn(const char *str, size_t len);