Update `struct` initializer to work with relatively older `C++`.

2 files changed, 6 insertions, 5 deletions

diff --git a/mrbgems/mruby-bin-debugger/tools/mrdb/cmdmisc.c b/mrbgems/mruby-bin-debugger/tools/mrdb/cmdmisc.c
index 14b75aba7..0714f3f21 100644
--- a/mrbgems/mruby-bin-debugger/tools/mrdb/cmdmisc.c
+++ b/mrbgems/mruby-bin-debugger/tools/mrdb/cmdmisc.c
@@ -141,7 +141,8 @@ static listcmd_parser_state*
 listcmd_parser_state_new(mrb_state *mrb)
 {
   listcmd_parser_state *st = (listcmd_parser_state*)mrb_malloc(mrb, sizeof(listcmd_parser_state));
-  *st = (listcmd_parser_state){0};
+  static const listcmd_parser_state st_zero = {0};
+  *st = st_zero;
   return st;
 }
 
diff --git a/mrbgems/mruby-bin-debugger/tools/mrdb/mrdb.c b/mrbgems/mruby-bin-debugger/tools/mrdb/mrdb.c
index e409e3301..ee2ae0aca 100644
--- a/mrbgems/mruby-bin-debugger/tools/mrdb/mrdb.c
+++ b/mrbgems/mruby-bin-debugger/tools/mrdb/mrdb.c
@@ -186,9 +186,9 @@ static mrb_debug_context*
 mrb_debug_context_new(mrb_state *mrb)
 {
   mrb_debug_context *dbg = (mrb_debug_context*)mrb_malloc(mrb, sizeof(mrb_debug_context));
+  static const mrb_debug_context dbg_zero = {0};
 
-  *dbg = (mrb_debug_context){0};
-
+  *dbg = dbg_zero;
   dbg->xm = DBG_INIT;
   dbg->xphase = DBG_PHASE_BEFORE_RUN;
   dbg->next_bpno = 1;
@@ -225,9 +225,9 @@ static mrdb_state*
 mrdb_state_new(mrb_state *mrb)
 {
   mrdb_state *mrdb = (mrdb_state*)mrb_malloc(mrb, sizeof(mrdb_state));
+  static const mrdb_state mrdb_zero = {0};
 
-  *mrdb = (mrdb_state){0};
-
+  *mrdb = mrdb_zero;
   mrdb->dbg = mrb_debug_context_get(mrb);
   mrdb->command = (char*)mrb_malloc(mrb, MAX_COMMAND_LINE+1);
   mrdb->print_no = 1;