Unset is -1 not Nan

Change-Id: I6e7fac4b9f1c3dc6cc88c786db856ddecf3f8538
diff --git a/packages/PrintSpooler/src/com/android/printspooler/model/PrintSpoolerService.java b/packages/PrintSpooler/src/com/android/printspooler/model/PrintSpoolerService.java
index b92a389..90eef83 100644
--- a/packages/PrintSpooler/src/com/android/printspooler/model/PrintSpoolerService.java
+++ b/packages/PrintSpooler/src/com/android/printspooler/model/PrintSpoolerService.java
@@ -1070,7 +1070,7 @@
             if (progressString != null) {
                 float progress = Float.parseFloat(progressString);
 
-                if (progress != Float.NaN) {
+                if (progress != -1) {
                     printJob.setProgress(progress);
                 }
             }