Check if stdint has been included before trying to declare int variants. Needed…

Check if stdint has been included before trying to declare int variants. Needed for mod_v8 build in Windows

libs/stfu/stfu.h

@@ -77,6 +77,7 @@ typedef unsigned long   in_addr_t;
 #include <winsock2.h>
 #include <windows.h>
 typedef SOCKET stfu_socket_t;
+#ifndef _STDINT
 typedef unsigned __int64 uint64_t;
 typedef unsigned __int32 uint32_t;
 typedef unsigned __int16 uint16_t;
@@ -85,6 +86,7 @@ typedef __int64 int64_t;
 typedef __int32 int32_t;
 typedef __int16 int16_t;
 typedef __int8 int8_t;
+#endif
 typedef intptr_t stfu_ssize_t;
 typedef int stfu_filehandle_t;
 #define STFU_SOCK_INVALID INVALID_SOCKET