debug-engine: use strict prototypes

complained by GCC -Wstrict-prototypes

Author: yamt

core/iwasm/libraries/debug-engine/debug_engine.c

@@ -58,7 +58,7 @@ static WASMDebugEngine *g_debug_engine;
 static uint32 current_instance_id = 1;
 
 static uint32
-allocate_instance_id()
+allocate_instance_id(void)
 {
     uint32 id;
 
@@ -302,7 +302,7 @@ wasm_debug_control_thread_destroy(WASMDebugInstance *debug_instance)
 }
 
 static WASMDebugEngine *
-wasm_debug_engine_create()
+wasm_debug_engine_create(void)
 {
     WASMDebugEngine *engine;
 
@@ -326,7 +326,7 @@ wasm_debug_engine_create()
 }
 
 void
-wasm_debug_engine_destroy()
+wasm_debug_engine_destroy(void)
 {
     if (g_debug_engine) {
         wasm_debug_handler_deinit();

core/iwasm/libraries/debug-engine/debug_engine.h

@@ -133,7 +133,7 @@ bool
 wasm_debug_engine_init(char *ip_addr, int32 process_port);
 
 void
-wasm_debug_engine_destroy();
+wasm_debug_engine_destroy(void);
 
 WASMExecEnv *
 wasm_debug_instance_get_current_env(WASMDebugInstance *instance);

core/iwasm/libraries/debug-engine/handler.c

@@ -34,7 +34,7 @@ static char *tmpbuf;
 static korp_mutex tmpbuf_lock;
 
 int
-wasm_debug_handler_init()
+wasm_debug_handler_init(void)
 {
     int ret;
     tmpbuf = wasm_runtime_malloc(MAX_PACKET_SIZE);
@@ -51,7 +51,7 @@ wasm_debug_handler_init()
 }
 
 void
-wasm_debug_handler_deinit()
+wasm_debug_handler_deinit(void)
 {
     wasm_runtime_free(tmpbuf);
     tmpbuf = NULL;

core/iwasm/libraries/debug-engine/handler.h

@@ -9,10 +9,10 @@
 #include "gdbserver.h"
 
 int
-wasm_debug_handler_init();
+wasm_debug_handler_init(void);
 
 void
-wasm_debug_handler_deinit();
+wasm_debug_handler_deinit(void);
 
 void
 handle_interrupt(WASMGDBServer *server);