[PATCH v5 0/1] MR10380: vbscript: Return error 92 for uninitialized For loops.

[Francis De Brabandere (＠francisdb)]

Emit two OP_step instructions in for-to loops (matching the for-each
pattern with two OP_enumnext), so that errors in the second OP_step
are caught by the end-of-loop handler and exit the loop instead of
re-entering the body.

Convert VT_EMPTY to VT_I2(0) in OP_numval so that legitimate Empty
values become numeric while error-handler-padded VT_EMPTY values remain
distinguishable. Detect VT_EMPTY step or limit values in OP_step and
return MAKE_VBSERROR(VBSE_FOR_LOOP_NOT_INITIALIZED) (error 92).

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  v5: vbscript: Return error 92 for uninitialized For loops.
 
https://gitlab.winehq.org/wine/wine/-/merge_requests/10380