Fix EA-76946 - IOOBE: LineSet.checkLineIndex: do not try to get line start offset for line out off document

Author: NataliaUkhorskaya

idea/src/org/jetbrains/kotlin/idea/refactoring/jetRefactoringUtil.kt

@@ -290,7 +290,7 @@ public class SelectionAwareScopeHighlighter(val editor: Editor) {
 
 fun PsiFile.getLineStartOffset(line: Int): Int? {
     val doc = PsiDocumentManager.getInstance(project).getDocument(this)
-    if (doc != null) {
+    if (doc != null && line <= doc.lineCount) {
         val startOffset = doc.getLineStartOffset(line)
         val element = findElementAt(startOffset) ?: return startOffset