deal with empty subframes at UE side even in oaisim

The memset was also too big. It should only clear
one subframe.

Only tested without abstraction.
Abstraction does not work for the moment anyway, but just to
keep that in mind.

openair1/SCHED/phy_procedures_lte_ue.c

@@ -986,8 +986,8 @@ void ulsch_common_procedures(PHY_VARS_UE *ue, UE_rxtx_proc_t *proc, uint8_t empt
   int subframe_tx = proc->subframe_tx;
   int frame_tx = proc->frame_tx;
   int ulsch_start;
-#if defined(EXMIMO) || defined(OAI_USRP) || defined(OAI_BLADERF) || defined(OAI_LMSSDR)
   int overflow=0;
+#if defined(EXMIMO) || defined(OAI_USRP) || defined(OAI_BLADERF) || defined(OAI_LMSSDR)
   int k,l;
   int dummy_tx_buffer[3840*4] __attribute__((aligned(16)));
 #endif
@@ -1015,14 +1015,15 @@ void ulsch_common_procedures(PHY_VARS_UE *ue, UE_rxtx_proc_t *proc, uint8_t empt
   ulsch_start = (frame_parms->samples_per_tti*subframe_tx)-ue->N_TA_offset; //-ue->timing_advance;
 #endif //else EXMIMO
 
-#if defined(EXMIMO) || defined(OAI_USRP) || defined(OAI_BLADERF) || defined(OAI_LMSSDR)
+//#if defined(EXMIMO) || defined(OAI_USRP) || defined(OAI_BLADERF) || defined(OAI_LMSSDR)
   if (empty_subframe)
   {
 //#if 1
       overflow = ulsch_start - 9*frame_parms->samples_per_tti;
       for (aa=0; aa<frame_parms->nb_antennas_tx; aa++) {
 
-          memset(&ue->common_vars.txdata[aa][ulsch_start],0,4*cmin(frame_parms->samples_per_tti*LTE_NUMBER_OF_SUBFRAMES_PER_FRAME,ulsch_start+frame_parms->samples_per_tti));
+          //memset(&ue->common_vars.txdata[aa][ulsch_start],0,4*cmin(frame_parms->samples_per_tti*LTE_NUMBER_OF_SUBFRAMES_PER_FRAME,ulsch_start+frame_parms->samples_per_tti));
+          memset(&ue->common_vars.txdata[aa][ulsch_start],0,4*cmin(frame_parms->samples_per_tti-overflow,frame_parms->samples_per_tti));
 
           if (overflow> 0)
               memset(&ue->common_vars.txdata[aa][0],0,4*overflow);
@@ -1043,7 +1044,7 @@ void ulsch_common_procedures(PHY_VARS_UE *ue, UE_rxtx_proc_t *proc, uint8_t empt
 #endif*/
       return;
   }
-#endif
+//#endif
 
   if ((frame_tx%100) == 0)
     LOG_D(PHY,"[UE %d] Frame %d, subframe %d: ulsch_start = %d (rxoff %d, HW TA %d, timing advance %d, TA_offset %d\n",