improve stakes formatting

app/src/main/java/net/pokeranalytics/android/model/interfaces/StakesHolder.kt

@@ -90,7 +90,10 @@ data class CodedStake(var stakes: String) : Comparable<CodedStake> {
     fun formattedStakes(): String {
         val components = arrayListOf<String>()
         this.formattedBlinds()?.let { components.add(it) }
-        this.formattedAnte()?.let { components.add("($it)") }
+
+        if ((this.ante ?: -1.0) > 0.0) {
+            this.formattedAnte()?.let { components.add("($it)") }
+        }
 
         return if (components.isNotEmpty()) {
             components.joinToString(" ")