revert change to try fix build

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1866962 13f79535-47bb-0310-9956-ffa450edef68

src/ooxml/java/org/apache/poi/xslf/util/PPTX2PNG.java

@@ -216,9 +216,8 @@ public class PPTX2PNG {
                     break;
             }
 
-            final int width = Math.toIntExact(Math.round(pgsize.getWidth() * scale / lenSide));
-            final int height = Math.toIntExact(Math.round(pgsize.getHeight() * scale / lenSide));
-
+            final int width = (int) Math.rint(pgsize.getWidth() * scale / lenSide);
+            final int height = (int) Math.rint(pgsize.getHeight() * scale / lenSide);
 
             for (int slideNo : slidenum) {
                 proxy.setSlideNo(slideNo);