Merge pull request #7211 from mcoil1/pr/fixing-compiler-warnings

Fix a few compiler warnings

ompi/dpm/dpm.c

@@ -407,7 +407,7 @@ int ompi_dpm_connect_accept(ompi_communicator_t *comm, int root,
     }
     if (0 < opal_list_get_size(&ilist)) {
         uint32_t *peer_ranks = NULL;
-        int prn, nprn;
+        int prn, nprn = 0;
         char *val, *mycpuset;
         uint16_t u16;
         opal_process_name_t wildcard_rank;

ompi/mca/coll/libnbc/nbc_ialltoall.c

@@ -70,7 +70,7 @@ static int nbc_alltoall_init(const void* sendbuf, int sendcount, MPI_Datatype se
   enum {NBC_A2A_LINEAR, NBC_A2A_PAIRWISE, NBC_A2A_DISS, NBC_A2A_INPLACE} alg;
   void *tmpbuf = NULL;
   ompi_coll_libnbc_module_t *libnbc_module = (ompi_coll_libnbc_module_t*) module;
-  ptrdiff_t span, gap;
+  ptrdiff_t span, gap = 0;
 
   NBC_IN_PLACE(sendbuf, recvbuf, inplace);