Only trigger chimeric read when there are reads in both the forward a…

…nd reverse strands

If there are multiple chimeric reads which are all in the same direction, then Flexiplex will automatically split the
reads and so there is no need for chimeric read reporting.

flexiplex.c++

@@ -564,9 +564,9 @@ void search_read(vector<SearchResult> & reads, unordered_set<string> & known_bar
 
     reads[r].count = forward_reads.size() + reverse_reads.size();
 
-    // a chimeric read occurs when there are more than 1 detected barcodes in
-    // a single read
-    reads[r].chimeric = reads[r].count > 1;
+    // a chimeric read occurs when there are barcodes detected in both the forward
+    // and reverse strands.
+    reads[r].chimeric = forward_reads.size() && reverse_reads.size();
   }
 }