ConsoleProgressBar: Prevent max from being non-positive.

build.gradle

@@ -2,7 +2,7 @@ apply plugin: "groovy"
 apply plugin: "maven"
 
 group = "com.jdbernard"
-version = "3.7"
+version = "3.8"
 
 repositories {
     mavenCentral() }

src/main/groovy/com/jdbernard/util/ConsoleProgressBar.groovy

@@ -18,6 +18,9 @@ class ConsoleProgressBar {
   private String lastInfo = ""
   private long startTime
 
+  public void setMax(int max) {
+    this.max = Math.max(max, 1) }
+
   void update(int value, String info) {
     if (value == 0 || startTime == 0)
         startTime = System.currentTimeMillis()