stm32_i2c: Add missing NULL check. From Juha Niskanen
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@ -1399,7 +1399,7 @@ static int stm32_i2c_isr(struct stm32_i2c_priv_s *priv)
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* - or we close down by sending the stop bit
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*/
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if (priv->msgc > 0)
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if (priv->msgc > 0 && priv->msgv != NULL)
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{
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if (priv->msgv->flags & I2C_M_NORESTART)
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{
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