Fix exit logic.

Signed-off-by: Yilin Sun <imi415@imi.moe>

src/app_mrb_repl.c

@@ -46,7 +46,7 @@ int app_mrb_repl_init(void) {
     parser_state = mrb_parse_string(mrb, mrb_code, cxt);
 
     mrb_load_exec(mrb, parser_state, cxt);
-    
+
     return 0;
 }
 

src/main.c

@@ -42,9 +42,11 @@ dead_loop:
 }
 
 static void app_mrb_runtime_task(void *parameters) {
-    bool exit_repl = false;
+    bool exit_repl;
 
     for (;;) {
+        exit_repl = false;
+        
         if(app_mrb_repl_init() != 0){
             printf("Failed to initialize mruby REPL engine.\n");
             goto task_fail;