cmListFileLexer: Add missing include to avoid possible pointer truncation
The `cmsys/Enconding.h` include had a typo in its surrounding ifdef,
possibly causing a missing function declaration (`cmsysEncoding_DupToWide`).
As this is C code, this resulted in the code compiling, but with a truncated
return value, possibly causing crashes.
diff --git a/Source/LexerParser/cmListFileLexer.c b/Source/LexerParser/cmListFileLexer.c
index c726415..15dcda0 100644
--- a/Source/LexerParser/cmListFileLexer.c
+++ b/Source/LexerParser/cmListFileLexer.c
@@ -766,7 +766,7 @@
/* IWYU pragma: no_forward_declare yyguts_t */
-#ifdef WIN32
+#ifdef _WIN32
#include "cmsys/Encoding.h"
#endif
diff --git a/Source/LexerParser/cmListFileLexer.in.l b/Source/LexerParser/cmListFileLexer.in.l
index 6a6fb5f..fdf14d2 100644
--- a/Source/LexerParser/cmListFileLexer.in.l
+++ b/Source/LexerParser/cmListFileLexer.in.l
@@ -18,7 +18,7 @@
/* IWYU pragma: no_forward_declare yyguts_t */
-#ifdef WIN32
+#ifdef _WIN32
#include "cmsys/Encoding.h"
#endif
