fix default interleave value

The default value for interleave was wrongly set to 50.

Remove the value and take the devault from the default constructor instead of side channeling it from the json parser.

xmrstak/backend/amd/jconf.cpp

@@ -122,21 +122,22 @@ bool jconf::GetThreadConfig(size_t id, thd_cfg &cfg)
 		return false;
 
 	// interleave is optional
-	if(interleave == nullptr)
-		cfg.interleave = 50;
-	else if(!interleave->IsUint64())
+	if(interleave != nullptr)
 	{
-		printer::inst()->print_msg(L0, "ERROR: interleave must be a number");
-		return false;
-	}
-	else if((int)interleave->GetInt64() < 0 || (int)interleave->GetInt64() > 100)
-	{
-		printer::inst()->print_msg(L0, "ERROR: interleave must be in range [0;100]");
-		return false;
-	}
-	else
-	{
-		cfg.interleave = (int)interleave->GetInt64();
+		if(!interleave->IsInt())
+		{
+			printer::inst()->print_msg(L0, "ERROR: interleave must be a number");
+			return false;
+		}
+		else if(interleave->GetInt() < 0 || interleave->GetInt() > 100)
+		{
+			printer::inst()->print_msg(L0, "ERROR: interleave must be in range [0;100]");
+			return false;
+		}
+		else
+		{
+			cfg.interleave = interleave->GetInt();
+		}
 	}
 
 	if(!idx->IsUint64() || !intensity->IsUint64() || !w_size->IsUint64())