py/scope: Shrink scope_t struct by 1 machine word.
On 32-bit archs this makes the scope_t struct 48 bytes in size, which fits in 3 GC blocks (previously it used 4 GC blocks). This will lead to some savings when compiling scripts because there are usually quite a few scopes, one for each function and class. Note that qstrs will fit in 16 bits, this assumption is made in a few other places.
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@ -71,8 +71,8 @@ typedef struct _scope_t {
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struct _scope_t *parent;
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struct _scope_t *next;
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mp_parse_node_t pn;
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qstr source_file;
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qstr simple_name;
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uint16_t source_file; // a qstr
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uint16_t simple_name; // a qstr
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mp_raw_code_t *raw_code;
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uint8_t scope_flags; // see runtime0.h
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uint8_t emit_options; // see compile.h
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