Fix code scanning alert no. 133: Redundant null check due to previous dereference (#40)
* Update windDisp.c
* DLM - AI wanted to guard the '*area' dereference in if() statement, but the code path above has address of '&' operator for the assignment to 'area' so it must always be non-null. So I rejected this approach and removed the extra null check, replacing it with an assert().
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