ompi: initialize ompi_proc_list common symbol

ompi/proc/proc.c

@@ -42,7 +42,7 @@
 #include "ompi/runtime/mpiruntime.h"
 #include "ompi/runtime/params.h"
 
-opal_list_t  ompi_proc_list;
+opal_list_t  ompi_proc_list = {{0}};
 static opal_mutex_t ompi_proc_lock;
 static opal_hash_table_t ompi_proc_hash;