loc_violations used uninitialized in MPI_Allreduce #1205
Description
Bug
In `src/pre_process/m_data_output.fpp`, `loc_violations` is declared but never initialized before being conditionally assigned inside a loop. If no violations are found, the variable retains an uninitialized value which is then passed to `MPI_Allreduce`.
File: `src/pre_process/m_data_output.fpp`, line 479
Impact: MPI_Allreduce sums garbage from ranks where no violations occurred, producing incorrect global violation counts.
Severity: High — uninitialized variable passed to MPI collective.