bpo-40170: Add _PyIndex_Check() internal function (GH-19426)
Add _PyIndex_Check() function to the internal C API: fast inlined
verson of PyIndex_Check().
Add Include/internal/pycore_abstract.h header file.
Replace PyIndex_Check() with _PyIndex_Check() in C files of Objects
and Python subdirectories.
diff --git a/PCbuild/pythoncore.vcxproj b/PCbuild/pythoncore.vcxproj
index 22f1b95..95f9e9b 100644
--- a/PCbuild/pythoncore.vcxproj
+++ b/PCbuild/pythoncore.vcxproj
@@ -161,6 +161,7 @@
<ClInclude Include="..\Include\graminit.h" />
<ClInclude Include="..\Include\grammar.h" />
<ClInclude Include="..\Include\import.h" />
+ <ClInclude Include="..\Include\internal\pycore_abstract.h" />
<ClInclude Include="..\Include\internal\pycore_accu.h" />
<ClInclude Include="..\Include\internal\pycore_atomic.h" />
<ClInclude Include="..\Include\internal\pycore_bytes_methods.h" />