Forward port of diskUsage display bug. %d uses the native integer, which

overflows on 2**32 on summaries.  Changed it to use %.0f instead.

docs/changelog/7.x.x.txt

@@ -54,6 +54,8 @@
     http://www.webgui.org/bugs/tracker/deactivated-users-subscriptions
  - fix: Matrix: filling out no fields leads to unapprovable listing (perlDreamer Consulting, LLC)
     http://www.webgui.org/bugs/tracker/matrix-filling-out-no-fields-leads-to-unapprovable-listing
+ - fix: DiskUsage will return -1 if value too large (perlDreamer Consulting, LLC)
+    http://www.webgui.org/bugs/tracker/diskusage-will-return--1-if-value-too-large
 
 7.3.19
  - Fixed a formatting problem in the workflow editor screen.

sbin/diskUsage.pl

@@ -132,7 +132,7 @@ sub du {
 
 	# Format to a whole number unless the total is less than 1.  If it's less than 1 attempt to display 2 digits of precision to avoid displaying a zero size.
 	unless ($totalSize < 1) {
-		$totalSize = sprintf("%d", $totalSize);	
+		$totalSize = sprintf("%.0f", $totalSize);	
 	}
 	else {
 		$totalSize = sprintf("%.2f", $totalSize);