compiling glad clang and pedantic causes warning on windows
when compiling glad with clang using the flag `-pedantic` I get these warnings:

```
C:/Dev/glad/include\KHR/khrplatform.h:189:9: warning: extension used [-Wlanguage-extension-token]
  189 | typedef __int32                 khronos_int32_t;
      |         ^
C:/Dev/glad/include\KHR/khrplatform.h:190:18: warning: extension used [-Wlanguage-extension-token]
  190 | typedef unsigned __int32        khronos_uint32_t;
      |                  ^
C:/Dev/glad/include\KHR/khrplatform.h:191:9: warning: extension used [-Wlanguage-extension-token]
  191 | typedef __int64                 khronos_int64_t;
      |         ^
C:/Dev/glad/include\KHR/khrplatform.h:192:18: warning: extension used [-Wlanguage-extension-token]
  192 | typedef unsigned __int64        khronos_uint64_t;
      |         
```

these warnings do not happen on linux.

this seems to be the piece of code where the warning is generated:
```
#elif defined(_WIN32) && !defined(__SCITECH_SNAP__)

/*
 * Win32
 */
typedef __int32                 khronos_int32_t;
typedef unsigned __int32        khronos_uint32_t;
typedef __int64                 khronos_int64_t;
typedef unsigned __int64        khronos_uint64_t;
#define KHRONOS_SUPPORT_INT64   1
#define KHRONOS_SUPPORT_FLOAT   1
```
which is only used if _WIN32 is defined, it uses __intN types that are not standard, causing warnings.

---
### How to reproduce:

1. download glad from [here](https://glad.dav1d.de/)
2. add glad.c to your project
3. include `glad/glad.h`
4. compile with clang and the compiler flag `-pedantic`

this will cause the warnings mentioned above.

---
### more info:
OS: Windows 11
clang was installed through visual studio installer (C++ Clang Compiler for Windows)
clang --version output:
```
clang version 18.1.8
Target: x86_64-pc-windows-msvc
Thread model: posix
InstalledDir: C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\Llvm\x64\bin
```

note sure any of this information is important to the issue but I included them just in case