sha: don't return error on SHA_Init if already init

Author: DacoTaco

libogc/sha.c

@@ -96,10 +96,8 @@ static s32 SHA_ExecuteCommand(const ShaCommand command, const sha_context* conte
 
 s32 SHA_Init(void)
 {
-	if (__sha_fd >= 0)
-		return -1;
-
-	__sha_fd = IOS_Open("/dev/sha", 0);
+	if (__sha_fd < 0)
+		__sha_fd = IOS_Open("/dev/sha", 0);
 	if (__sha_fd < 0)
 		return __sha_fd;
 
@@ -113,7 +111,7 @@ s32 SHA_Init(void)
 		return __sha_hid;
 	}
 
-	return 0;
+	return IPC_OK;
 }
 
 s32 SHA_Close(void)
@@ -181,4 +179,4 @@ s32 SHA_Calculate(const void* data, const u32 data_size, void* message_digest)
 	return SHA_Finalize(&context, data, data_size, message_digest);
 }
 
-#endif
+#endif