MTL_MXM/PML_YALLA: fix coverity issues.

ompi/mca/mtl/mxm/mtl_mxm.c

@@ -597,10 +597,12 @@ int ompi_mtl_mxm_del_procs(struct mca_mtl_base_module_t *mtl, size_t nprocs,
 #if MXM_API >= MXM_VERSION(3,1)
     if (ompi_mtl_mxm.bulk_disconnect) {
         size_t nprocs_world;
-        ompi_proc_world(&nprocs_world);
+        ompi_proc_t **procs;
+        procs = ompi_proc_world(&nprocs_world);
         if (nprocs == nprocs_world) {
             mxm_ep_powerdown(ompi_mtl_mxm.ep);
         }
+        free(procs);
     }
 #endif
 

ompi/mca/pml/yalla/pml_yalla.c

@@ -58,7 +58,8 @@ static int send_ep_address(void)
     int rc;
 
     addrlen = 0;
-    mxm_ep_get_address(ompi_pml_yalla.mxm_ep, NULL, &addrlen);
+    error = mxm_ep_get_address(ompi_pml_yalla.mxm_ep, NULL, &addrlen);
+    PML_YALLA_ASSERT(error == MXM_ERR_BUFFER_TOO_SMALL);
 
     address = alloca(addrlen);
     error = mxm_ep_get_address(ompi_pml_yalla.mxm_ep, address, &addrlen);