Fix build break due to 'W'

Commit migrated from https://github.com/dotnet/corefx/commit/94e9d02ad70b2224d012ac4a66eaa1f913ae4f29

diff --git a/src/libraries/System.Runtime.Extensions/src/System/Environment.Windows.cs b/src/libraries/System.Runtime.Extensions/src/System/Environment.Windows.cs
index 21e2ab0..7a6a840 100644 (file)
--- a/src/libraries/System.Runtime.Extensions/src/System/Environment.Windows.cs
+++ b/src/libraries/System.Runtime.Extensions/src/System/Environment.Windows.cs
@@ -69,7 +69,7 @@ namespace System
             var builder = new ValueStringBuilder(initialBuffer);
 
             uint length;
-            while ((length = Interop.Kernel32.ExpandEnvironmentStringsW(name, ref builder.GetPinnableReference(), (uint)builder.Capacity)) > builder.Capacity)
+            while ((length = Interop.Kernel32.ExpandEnvironmentStrings(name, ref builder.GetPinnableReference(), (uint)builder.Capacity)) > builder.Capacity)
             {
                 builder.EnsureCapacity((int)length);
             }