Windows App SDK 1.7.3：`base.h` `#elif _DEBUG` gives build error C1017: invalid integer constant expression

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### Describe the bug

#define CPPWINRT_VERSION "2.0.250303.1"

#if !defined(__cpp_lib_source_location) || defined(WINRT_NO_SOURCE_LOCATION)
// Case1: cpp17 mode. The source_location intrinsics are not available.
// Case2: The caller has disabled source_location support. Ensure that there is no binary size overhead for line/file/function.
#define WINRT_IMPL_BUILTIN_LINE 0
#define WINRT_IMPL_BUILTIN_FILE nullptr
#define WINRT_IMPL_BUILTIN_FUNCTION nullptr
#elif defined(_DEBUG)
// cpp20 _DEBUG builds include function information, which has a heavy binary size impact, in addition to file/line.
#define WINRT_IMPL_BUILTIN_LINE __builtin_LINE()
#define WINRT_IMPL_BUILTIN_FILE __builtin_FILE()
#define WINRT_IMPL_BUILTIN_FUNCTION __builtin_FUNCTION()
#else
// Release builds in cpp20 mode get file and line information but NOT function information. Function strings
// quickly add up to a substantial binary size impact, especially when templates are heavily used.
#define WINRT_IMPL_BUILTIN_LINE __builtin_LINE()
#define WINRT_IMPL_BUILTIN_FILE __builtin_FILE()
#define WINRT_IMPL_BUILTIN_FUNCTION nullptr
#endif

### Steps to reproduce the bug

_DEBUG is defined, but in a way that doesn't resolve to a valid integer constant expression:

_DEBUG;%(PreprocessorDefinitions)

### Expected behavior

_No response_

### Screenshots

_No response_

### NuGet package version

Windows App SDK 1.7.3: 1.7.250606001

### Packaging type

Unpackaged

### Windows version

Windows 11 version 24H2 (22621, October 2024 Update)

### IDE

_No response_

### Additional context

_No response_

Start by locating base.h and inspect the conditional that checks _DEBUG around the WINRT_IMPL_BUILTIN_* definitions. Reproduce the Windows App SDK 1.7.3 build with _DEBUG defined as shown; done means the project compiles without C1017 while preserving the intended debug and release behavior.

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