Fix issue when firing TimerProc() destroys timer

testing/resources/bug_634394.pdf

Index: testing/resources/bug_634394.pdf
diff --git a/testing/resources/bug_551248.pdf b/testing/resources/bug_634394.pdf
similarity index 89%
copy from testing/resources/bug_551248.pdf
copy to testing/resources/bug_634394.pdf
index dea541a8de7344477c6af48229ff2f31354f718d..a17a9f213e5153356f7277b1fe6d59736fe540aa 100644
--- a/testing/resources/bug_551248.pdf
+++ b/testing/resources/bug_634394.pdf
@@ -66,14 +66,16 @@ endobj
 50 0 obj <<
 >>
 stream
+var timer = app.setTimeOut("fireTimeOut()", 3000);
+var interval = app.setInterval("fireInterval()", 1000);
 function fireTimeOut() {
-  app.alert("timer fired");
+  app.alert("goodbye world");
+  app.clearInterval(interval);
 }
 function fireInterval() {
-  app.alert("interval fired");
+  app.alert("hello world");
+  app.clearInterval(interval);
 }
-app.setTimeOut("fireTimeOut()", 3000);
-app.setInterval("fireInterval()", 2000);
 endstream
 endobj
 xref
@@ -133,5 +135,5 @@ trailer <<
   /Root 1 0 R
 >>
 startxref
-1055
+1143
 %%EOF