Bed roughness fishpasses (Rugofond) : chained calculation fail when a linked parameter value value is not already computed

Bug description:

• Duplicate a bed roughness fish pass
• In the first fish pass flow is set to be calculated
• In the second fish upstream water level is set to be calculated and flow value is linked to the fist fishpass (its value is in calculation)
• Launch the calculation in the second bed roughness
• The calculation fail

Expected behaviour:

The chain calculation should be launched and the flow value used to calculate the upstream water level in the second nub.