Avoid including stddef.h on Windows for Z_SOLO compile [Niessink].
diff --git a/zconf.h b/zconf.h
index 8a46a58..c71cade 100644
--- a/zconf.h
+++ b/zconf.h
@@ -426,7 +426,9 @@
#endif
#ifdef _WIN32
-# include <stddef.h> /* for wchar_t */
+# ifndef Z_SOLO
+# include <stddef.h> /* for wchar_t */
+# endif
#endif
/* a little trick to accommodate both "#define _LARGEFILE64_SOURCE" and
diff --git a/zconf.h.cmakein b/zconf.h.cmakein
index b6ca59a..1d31b67 100644
--- a/zconf.h.cmakein
+++ b/zconf.h.cmakein
@@ -428,7 +428,9 @@
#endif
#ifdef _WIN32
-# include <stddef.h> /* for wchar_t */
+# ifndef Z_SOLO
+# include <stddef.h> /* for wchar_t */
+# endif
#endif
/* a little trick to accommodate both "#define _LARGEFILE64_SOURCE" and
diff --git a/zconf.h.in b/zconf.h.in
index 8a46a58..c71cade 100644
--- a/zconf.h.in
+++ b/zconf.h.in
@@ -426,7 +426,9 @@
#endif
#ifdef _WIN32
-# include <stddef.h> /* for wchar_t */
+# ifndef Z_SOLO
+# include <stddef.h> /* for wchar_t */
+# endif
#endif
/* a little trick to accommodate both "#define _LARGEFILE64_SOURCE" and