Forge ahead with detection even if we missed an alignment pattern -- can still decode in some cases without it

git-svn-id: https://zxing.googlecode.com/svn/trunk@929 59b500cc-1b3d-0410-9834-0bbf25fbcc57

core/src/com/google/zxing/qrcode/detector/Detector.java

@@ -106,10 +106,7 @@ public final class Detector {
           // try next round
         }
       }
-      if (alignmentPattern == null) {
-        throw ReaderException.getInstance();
-      }
-
+      // If we didn't find alignment pattern... well try anyway without it
     }
 
     BitMatrix bits = sampleGrid(image, topLeft, topRight, bottomLeft, alignmentPattern, dimension);