Make sure 'used' is set to 0 if no conversions take place.
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@ -154,6 +154,7 @@ static int wcstombs_sbcs_slow( const struct sbcs_table *table, int flags,
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if (!defchar) defchar = &table_default;
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if (!used) used = &tmp; /* avoid checking on every char */
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*used = 0;
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for (len = dstlen; srclen && len; dst++, len--, src++, srclen--)
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{
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@ -320,6 +321,7 @@ static int wcstombs_dbcs_slow( const struct dbcs_table *table, int flags,
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if (defchar) defchar_value = defchar[1] ? ((defchar[0] << 8) | defchar[1]) : defchar[0];
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if (!used) used = &tmp; /* avoid checking on every char */
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*used = 0;
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for (len = dstlen; srclen && len; len--, srclen--, src++)
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{
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