Fix regression for tracing asn1c enc/dec tracing

As described in common/utils/config.h, it is possible to hook into the
asn1c tracing mechanism to print logs.

This commit fixes a regression to print theses traces properly in OAI.
Above-mentioned file explains also how to reduce the amount of logs,
e.g., for single code blocks.

common/utils/config.h

@@ -22,12 +22,15 @@
 #ifndef UTILS_CONFIG_H_ASN1
 #define UTILS_CONFIG_H_ASN1
 
-// This is hard coded file name "config.h" and HAVE_CONFIG_H_ in asn1c skeletons
+// This is hard coded file name "config.h" in asn1c skeletons
 
 /*
  * This file "config.h" will be used by asn1c if HAVE_CONFIG_H_ is defined and
- * included. This logs asn1c encoder and decoder traces at execution time using
- * the regular OAI logging system, i.e., LOG_I(ASN1...);
+ * included (this is the case for OAI).
+ * This allows to trace the asn1c encoder and decoder at execution time using
+ * the regular OAI logging system, i.e., LOG_I(ASN1, ...);
+ *
+ * to enable it, at compilation time, see ./build_oai --enable-asn1c-debug
  *
  * As it is very verbose, note that you can change the log level per module in
  * source or in gdb, e.g., to only activate it for a short time.
@@ -47,7 +50,7 @@
  */
 
 #include "common/utils/LOG/log.h"
-#if DEBUG_ASN1C
+#if TRACE_ASN1C_ENC_DEC
 #define ASN_DEBUG(x...) do{ LOG_I(ASN1,x);LOG_I(ASN1,"\n"); } while(false)
 #else
 #define ASN_DEBUG(x...)