Optional register property in stacking rules must be -1 when absent.
Fixed this.
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@ -525,7 +525,7 @@ stackdeflist_el
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;
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;
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optuses
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optuses
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: /* empty */
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: /* empty */
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{ $$ = 0; nallreg=0;}
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{ $$ = -1; nallreg=0;}
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| USES propno
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| USES propno
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{ $$ = $2; nallreg = 1; allreg[0] = $2; }
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{ $$ = $2; nallreg = 1; allreg[0] = $2; }
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;
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;
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