Bugfix: PDF/A-1a mode was not properly reported.

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@955560 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/fop/pdf/PDFAMode.java

@@ -49,7 +49,7 @@ public final class PDFAMode {
      * @return true if this mode obeys the restrictions established by PDF/A-1a.
      */
     public boolean isPDFA1LevelA() {
-        return (this != DISABLED);
+        return (this == PDFA_1A);
     }
 
     /**