hwpf: fix ArrayIndexOutOfBoundsException in Range.getCharacterRun() (TIKA-577)

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1058176 13f79535-47bb-0310-9956-ffa450edef68

src/scratchpad/src/org/apache/poi/hwpf/usermodel/Range.java

@@ -791,6 +791,11 @@ public class Range { // TODO -instantiable superclass
 
 		int[] point = findRange(_paragraphs, _parStart, Math.max(chpx.getStart(), _start), chpx
 				.getEnd());
+
+        if (point[0] >= _paragraphs.size()) {
+            return null;
+        }
+
 		PAPX papx = _paragraphs.get(point[0]);
 		short istd = papx.getIstd();