correct additional threads

samtools.wdl

@@ -369,9 +369,9 @@ task Sort {
         String outputPath = basename(inputBam, "\.bam") + ".sorted.bam"
         Boolean sortByName = false
         Int compressionLevel = 1
-        Int threads = 0
+        Int threads = 1
         Int memoryPerThreadGb = 4
-        Int memoryGb = 1 + (threads + 1) * memoryPerThreadGb
+        Int memoryGb = 1 + threads * memoryPerThreadGb
         String dockerImage = "quay.io/biocontainers/samtools:1.10--h9402c20_2"
         Int timeMinutes = 1 + ceil(size(inputBam, "G") * 3)
     }
@@ -400,7 +400,7 @@ task Sort {
     }
 
     runtime {
-        cpu: 1 + threads
+        cpu: 1
         memory: "~{memoryGb}G"
         docker: dockerImage
         time_minutes: timeMinutes