remove 'variable may be used uninitialized' warning

This is not absolutely necessary (the processing is ok),
but the warning is annoying.

openair1/PHY/LTE_TRANSPORT/pucch.c

@@ -555,6 +555,7 @@ void generate_pucch2x(int32_t **txdataF,
   N_UL_symb = (fp->Ncp==0) ? 7 : 6;
   data_ind  = 0;
   zptr      = z;
+  nprime    = 0;
   for (ns=(subframe<<1),u=u0,v=v0; ns<(2+(subframe<<1)); ns++,u=u1,v=v1) {
 
     if ((ns&1) == 0)

openair1/PHY/LTE_TRANSPORT/ulsch_coding.c

@@ -234,7 +234,7 @@ uint32_t ulsch_encoding(uint8_t *a,
   PHY_MEASUREMENTS *meas = &ue->measurements;
   LTE_UE_ULSCH_t *ulsch=ue->ulsch[eNB_id];
   LTE_UE_DLSCH_t **dlsch = ue->dlsch[eNB_id];
-  uint16_t rnti;
+  uint16_t rnti = 0xffff;
 
   if (!ulsch) {
     LOG_E(PHY,"Null ulsch ptr %p\n",ulsch);