Assign error return value for failed write
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@ -140,6 +140,7 @@ int main( int argc, char *argv[] )
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if( fwrite( buf, 1, olen, f ) != olen )
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{
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ret = 1;
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mbedtls_printf( "failed\n ! fwrite failed\n\n" );
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fclose( f );
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goto exit;
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