fix some more valgrind errors

targets/RT/USER/lte-uesoftmodem.c

@@ -419,7 +419,7 @@ void set_default_frame_parms(LTE_DL_FRAME_PARMS *frame_parms[MAX_NUM_CCs]) {
   int CC_id;
 
   for (CC_id=0; CC_id<MAX_NUM_CCs; CC_id++) {
-    frame_parms[CC_id] = (LTE_DL_FRAME_PARMS *) malloc(sizeof(LTE_DL_FRAME_PARMS));
+    frame_parms[CC_id] = (LTE_DL_FRAME_PARMS *) calloc(1, sizeof(LTE_DL_FRAME_PARMS));
     /* Set some default values that may be overwritten while reading options */
     frame_parms[CC_id]->frame_type          = FDD;
     frame_parms[CC_id]->tdd_config          = 3;