ompi: fix coverity issues

Fixes CID 715741: Logically dead code

Verified. Removed dead code.

Fixes CID 1320878: Resource leak

Free proc_list before returning.

Signed-off-by: Nathan Hjelm <hjelmn@me.com>

ompi/dpm/dpm.c

@@ -179,6 +179,7 @@ int ompi_dpm_connect_accept(ompi_communicator_t *comm, int root,
             free(nstring);
             if (NULL == (nstring = (char*)opal_pmix.get_nspace(proc_list[i]->super.proc_name.jobid))) {
                 opal_argv_free(members);
+                free (proc_list);
                 return OMPI_ERR_NOT_SUPPORTED;
             }
             opal_argv_append_nosize(&members, nstring);

ompi/mca/coll/ml/coll_ml_allocation.c

@@ -43,19 +43,11 @@ mca_bcol_base_memory_block_desc_t *mca_coll_ml_allocate_block(struct mca_coll_ml
 
     if (!memory_block->block){
         ML_VERBOSE(1, ("lmngr failed."));
-        ret = NULL;
-        goto exit_ERROR;
+        free(memory_block);
+        return NULL;
     }
 
     return memory_block;
-
-exit_ERROR:
-    if (memory_block){
-        free(memory_block);
-        return ret;
-    }
-
-    return ret;
 }
 
 void mca_coll_ml_free_block (mca_bcol_base_memory_block_desc_t *ml_memblock)