Avoid uninitialized variable.

utils/create_image.in

@@ -1502,14 +1502,25 @@ sub check_progress($$)
     # been exceeded.
     #
     my $cursize = (stat($fname))[7];
-    if ($usefup && !defined($cursize)) {
+    if (!defined($cursize)) {
 	#
 	# XXX avoid an ugly race.
 	# When done, frisuploadd moves foo.tmp -> foo
 	# If we didn't find foo.tmp, try foo now.
 	#
-	$fname =~ s/\.tmp$//;
-	$cursize = (stat($fname))[7];
+	if ($usefup) {
+	    $fname =~ s/\.tmp$//;
+	    $cursize = (stat($fname))[7];
+	}
+	#
+	# XXX avoid an ugly uninitialized value.
+	# This should not happen, since we created the file,
+	# but just in case, if the file doesn't exist set the size to 0.
+	# We will eventually timeout.
+	#
+	if (!defined($cursize)) {
+	    $cursize = 0;
+	}
     }
     if ($cursize > $maximagesize) {
 	$result = "toobig";