add if statement for vizbin

rules/Analysis/MGMT.rules

@@ -465,10 +465,12 @@ rule ANALYSIS_VIZBIN:
         -o $TMP_VIZBIN/data.points \
         -k {config[vizbin][kmer]} \
         -p {config[vizbin][perp]} >> {log}
-        echo rv: $?
-        paste <(grep "^>" {output[0]} | sed -e 's/>//') \
-        <(cat $TMP_VIZBIN/data.points | sed -e 's/,/\t/') > {output[1]}
 
+        if [ -f $TMP_VIZBIN/data.points ]
+            then
+                paste <(grep "^>" {output[0]} | sed -e 's/>//') \
+                <(cat $TMP_VIZBIN/data.points | sed -e 's/,/\t/') > {output[1]}
+            fi
         rm -rf $TMP_VIZBIN
         """