added null check

diff --git a/jp.sourceforge.moreemacs.exp/src/jp/sourceforge/moreemacs/exp/NextErrorHandler.java b/jp.sourceforge.moreemacs.exp/src/jp/sourceforge/moreemacs/exp/NextErrorHandler.java
index b5aeb0c..922358c 100644 (file)
--- a/jp.sourceforge.moreemacs.exp/src/jp/sourceforge/moreemacs/exp/NextErrorHandler.java
+++ b/jp.sourceforge.moreemacs.exp/src/jp/sourceforge/moreemacs/exp/NextErrorHandler.java
@@ -30,6 +30,9 @@ public class NextErrorHandler extends AbstractHandler {
         IWorkbenchPage page = site.getPage();\r
 \r
         MarkerSupportView problemView = (MarkerSupportView) page.findView("org.eclipse.ui.views.ProblemView");\r
+        if(problemView == null) {\r
+            return null;\r
+        }\r
         @SuppressWarnings("restriction")\r
         IMarker[] currentMarkers = problemView.getSelectedMarkers();\r
         IMarker startPoint = (currentMarkers.length != 0)?currentMarkers[currentMarkers.length-1]:null;\r