fix NPE

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1761844 13f79535-47bb-0310-9956-ffa450edef68

diff --git a/src/ooxml/java/org/apache/poi/xssf/usermodel/helpers/ColumnHelper.java b/src/ooxml/java/org/apache/poi/xssf/usermodel/helpers/ColumnHelper.java
index 1e51e5e3f79d00d4424644a82b70816ce121bda9..b27100656beae45abe195a4b59afc2dddfceacd7 100644 (file)
--- a/src/ooxml/java/org/apache/poi/xssf/usermodel/helpers/ColumnHelper.java
+++ b/src/ooxml/java/org/apache/poi/xssf/usermodel/helpers/ColumnHelper.java
@@ -319,6 +319,7 @@ public class ColumnHelper {
     }
 
     public int getIndexOfColumn(CTCols cols, CTCol searchCol) {
+        if (cols == null || searchCol == null) return -1;
         int i = 0;
         for (CTCol col : cols.getColArray()) {
             if (col.getMin() == searchCol.getMin() && col.getMax() == searchCol.getMax()) {