Add IS_STORAGE() macro

Author: fwsGonzo

cpp/gbc/src/main.cpp

@@ -296,7 +296,7 @@ int main(int argc, char** argv)
 {
 	(void)argc;
 
-	if (strcmp(argv[2], "storage") == 0)
+	if (IS_STORAGE())
 	{
 		/* GameBoy Color machine */
 		machine = new gbc::Machine(romdata);

kvm_api.h

@@ -51,7 +51,7 @@ extern void register_func(int, ...);
 **/
 #define IS_SANDBOXED_MAIN()  (getenv("KVM_NAME") != (void*)0)
 #define IS_LINUX_MAIN()      !IS_SANDBOXED_MAIN()
-
+#define IS_STORAGE()         (strcmp(getenv("KVM_TYPE"), "storage") == 0)
 /**
  * During the start of the program, one should register callback functions
  * that will handle different types of requests, like GET, POST etc.