Osmocom_Gb_Types: Fix warning: inadequate restriction on the referenced function

Fixes warning:
Osmocom_Gb_Types.ttcn:1377.13-32: warning: Inadequate restriction on the
referenced function `f_oct_or_wc(bmax, 2)', this may cause a dynamic test
case error at runtime

Change-Id: Icb8698c7f2ca697a3638d5a4e4e38f20e14fd34c
diff --git a/library/Osmocom_Gb_Types.ttcn b/library/Osmocom_Gb_Types.ttcn
index cbaeb72..4e1fb8c 100644
--- a/library/Osmocom_Gb_Types.ttcn
+++ b/library/Osmocom_Gb_Types.ttcn
@@ -1374,7 +1374,7 @@
 				lengthIndicator := {
 					length1 := 2
 				},
-				bmax := f_oct_or_wc(bmax, 2)
+				bmax := int2oct(bmax, 2)
 			},
 			bucket_Leak_Rate := {
 				iEI := '03'O,
@@ -1382,7 +1382,7 @@
 				lengthIndicator := {
 					length1 := 2
 				},
-				r_Value := f_oct_or_wc(bucket_leak_rate, 2)
+				r_Value := int2oct(bucket_leak_rate, 2)
 			},
 			bucket_Full_Ratio := omit,
 			flow_Control_Granularity := omit