encoding: fix an uninitialized field in gen_freq_params()

This is not critical, given that we set 'ElementsOf_RFL_NUMBER' to 0.
But still, let's ensure that all fields are initialized.

Change-Id: I4dd5202d1c4bd75baf0ab4f88ffefcc47272bd9c
Fixes: CID#272999

src/encoding.cpp

@@ -573,6 +573,8 @@ static void gen_freq_params(Frequency_Parameters_t *freq_params,
 	fh_params.MAIO = pdch->fh.maio;
 	fh_params.GPRS_Mobile_Allocation.HSN = pdch->fh.hsn;
 	fh_params.GPRS_Mobile_Allocation.ElementsOf_RFL_NUMBER = 0;
+	memset(&fh_params.GPRS_Mobile_Allocation.RFL_NUMBER[0], 0x00,
+	       sizeof(fh_params.GPRS_Mobile_Allocation.RFL_NUMBER));
 
 	/* Mobile Allocation bitmap */
 	fh_params.GPRS_Mobile_Allocation.UnionType = 0; /* MA bitmap */