Bug 345670: fix crash in nsTypeAheadFind::RangeStartsInsideLink, patch by Adam Guthrie <ispiked@gmail.com>, r+sr=sicking

extensions/typeaheadfind/src/nsTypeAheadFind.cpp

@@ -1649,7 +1649,7 @@ nsTypeAheadFind::RangeStartsInsideLink(nsIDOMRange *aRange,
     if (parent) {
       nsIContent *parentsFirstChild = parent->GetChildAt(0);
       // We don't want to look at a whitespace-only first child
-      if (parentsFirstChild->TextIsOnlyWhitespace())
+      if (parentsFirstChild && parentsFirstChild->TextIsOnlyWhitespace())
         parentsFirstChild = parent->GetChildAt(1);
 
       if (parentsFirstChild != startContent) {

toolkit/components/typeaheadfind/src/nsTypeAheadFind.cpp

@@ -852,7 +852,7 @@ nsTypeAheadFind::RangeStartsInsideLink(nsIDOMRange *aRange,
     nsIContent *parentsFirstChild = parent->GetChildAt(0);
 
     // We don't want to look at a whitespace-only first child
-    if (parentsFirstChild->TextIsOnlyWhitespace()) {
+    if (parentsFirstChild && parentsFirstChild->TextIsOnlyWhitespace()) {
       parentsFirstChild = parent->GetChildAt(1);
     }