Fixed bug #8292 : run_all PDB fails with "Error calling COPY_XTRA"

Author: hvlad

builds/win32/setenvvar.bat

@@ -119,8 +119,14 @@ rem version using the available env vars so we test to see if the runtime dir
 rem exists and if not we fall back to 3.
 rem NOTE 2 This code is likely to break again in the future !!!!
   set MSVC_RUNTIME_MINOR_VERSION=%VCToolsVersion:~3,1%
-  if not exist "%VCToolsRedistDir%%VSCMD_ARG_TGT_ARCH%\Microsoft.VC%MSVC_RUNTIME_MAJOR_VERSION%%MSVC_RUNTIME_MINOR_VERSION%.CRT" (
+
+  @setlocal EnableDelayedExpansion
+
+  if not exist "!VCToolsRedistDir!!VSCMD_ARG_TGT_ARCH!\Microsoft.VC!MSVC_RUNTIME_MAJOR_VERSION!!MSVC_RUNTIME_MINOR_VERSION!.CRT" (
+    @endlocal  
     set MSVC_RUNTIME_MINOR_VERSION=3
+  ) else (
+    @endlocal  
   )
   set MSVC_RUNTIME_LIBRARY_VERSION=%MSVC_RUNTIME_MAJOR_VERSION%%MSVC_RUNTIME_MINOR_VERSION%