[PR] HemfPlusPath: validate PointCount before array allocati on [poi]

jmestwa-coder opened a new pull request, #1103:
URL: https://github.com/apache/poi/pull/1103

   ## Summary
   
   Validate `PointCount` before allocating path arrays in `EmfPlusPath`.
   
   ## Problem
   
   * `PointCount` is read directly from EMF+ input.
   * The value is used as the length of both `pathPoints` and `pointTypes` arrays.
   * Invalid values can trigger allocation failures before any path data is processed.
   
   ## Fix
   
   * Add validation for `PointCount` using `IOUtils.safelyAllocateCheck(...)`.
   * Reject negative and oversized values before array allocation.
   * Align `EmfPlusPath` with the existing allocation-safety pattern used elsewhere in HEMF parsing.


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