Fixed BOO-613: Exception thrown when double clicking on '"' at the end of the document.

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/trunk@943 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/Libraries/ICSharpCode.TextEditor/Project/Src/Gui/TextAreaMouseHandler.cs

@@ -225,7 +225,9 @@ namespace ICSharpCode.TextEditor
 							if (textArea.Caret.Offset < textArea.Document.TextLength) {
 								int next = FindNext(textArea.Document, textArea.Caret.Offset + 1, '"');
 								minSelection = textArea.Caret.Position;
-								maxSelection = textArea.Document.OffsetToPosition(next > textArea.Caret.Offset ? next + 1 : next);
+								if (next > textArea.Caret.Offset && next < textArea.Document.TextLength)
+									next += 1;
+								maxSelection = textArea.Document.OffsetToPosition(next);
 							}
 							break;
 						default: