[PR] Apply allocation bounds checks to EMF+ path and brush ele ment counts [poi]

jmestwa-coder opened a new pull request, #1104:
URL: https://github.com/apache/poi/pull/1104

   ## Summary
   
   EMF+ path and brush records allocate arrays directly from count fields read from the input stream.
   
   This change applies the existing POI allocation safety checks before the following count-driven allocations:
   
   - Path point arrays in `HemfPlusPath`
   - Surrounding color arrays in `HemfPlusBrush`
   - Boundary point arrays in `HemfPlusBrush`
   - Position arrays in `HemfPlusBrush`
   
   Invalid or excessively large counts are now rejected with `RecordFormatException` instead of attempting oversized allocations.
   
   ## Tests
   
   Added regression tests covering:
   
   - `Integer.MAX_VALUE` counts
   - Negative counts (`0xFFFFFFFF`)
   
   These tests verify that malformed inputs are rejected through the standard allocation validation path.


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