pixma: assignment must be inside the loop to be effective.

backend/pixma/pixma.c

@@ -1527,10 +1527,10 @@ pixma_jpeg_read(pixma_sane_t *ss, SANE_Byte *data,
             b = (b << 1) | 0;
          else
             b = (b << 1) | 1;
-        }
           if ((i % 8) == 0)
             *(d++) = b;
         }
+    }
 
   src->linebuffer_size = *length;
   src->linebuffer_index = 0;