Fix line number reporting for unresolved breakpoints.

runtime/observatory/lib/src/elements/script_inset.dart

Index: runtime/observatory/lib/src/elements/script_inset.dart
diff --git a/runtime/observatory/lib/src/elements/script_inset.dart b/runtime/observatory/lib/src/elements/script_inset.dart
index 9988ec99756e555626906189863ec475a0f96ea0..47bbff7b4f3d4066834e0250192e0e19594d5546 100644
--- a/runtime/observatory/lib/src/elements/script_inset.dart
+++ b/runtime/observatory/lib/src/elements/script_inset.dart
@@ -429,7 +429,7 @@ class ScriptInsetElement extends ObservatoryElement {
           if (loc.tokenPos != null) {
             line = script.tokenToLine(loc.tokenPos);
           } else {
-            line = script.tokenToLine(loc.line);
+            line = loc.line;
           }
           if ((line >= _startLine) && (line <= _endLine)) {
             _updateTask.queue();