py: Change vstr so that it doesn't null terminate buffer by default.

This cleans up vstr so that it's a pure "variable buffer", and the user
can decide whether they need to add a terminating null byte.  In most
places where vstr is used, the vstr did not need to be null terminated
and so this patch saves code size, a tiny bit of RAM, and makes vstr
usage more efficient.  When null termination is needed it must be
done explicitly using vstr_null_terminate.

1 files changed, 1 insertions, 1 deletions

diff --git a/py/emit.h b/py/emit.h
index 2ca3d0420..772ee0473 100644
--- a/py/emit.h
+++ b/py/emit.h
@@ -157,7 +157,7 @@ typedef struct _emit_method_table_t {
 
 #if MICROPY_EMIT_CPYTHON
     // these methods are only needed for emitcpy
-    void (*load_const_verbatim_str)(emit_t *emit, const char *str);
+    void (*load_const_verbatim_strn)(emit_t *emit, const char *str, mp_uint_t len);
     void (*load_closure)(emit_t *emit, qstr qst, mp_uint_t local_num);
     void (*setup_loop)(emit_t *emit, mp_uint_t label);
 #endif