Fix sorting for files that only differ in case.

lib/private/naturalsort_defaultcollator.php

@@ -11,10 +11,13 @@ namespace OC;
 
 class NaturalSort_DefaultCollator {
 	public function compare($a, $b) {
-		$result = strcasecmp($a, $b); 
-    		if ($result === 0) {
-      			return 0;
-    		}
-    		return ($result < 0) ? -1 : 1;
+		$result = strcasecmp($a, $b);
+		if ($result === 0) {
+			if ($a === $b) {
+				return 0;
+			}
+			return ($a > $b) ? -1 : 1;
+		}
+		return ($result < 0) ? -1 : 1;
 	}
 }