Merge pull request #205 from diaphore/fix-wgl.h

Add target wgl.h
diff --git a/api/GL/wgl.h b/api/GL/wgl.h
index f424bf9..41fedba 100644
--- a/api/GL/wgl.h
+++ b/api/GL/wgl.h
@@ -1,12 +1,12 @@
-#ifndef __wgl_h_
-#define __wgl_h_ 1
+#ifndef __wgl_wgl_h_
+#define __wgl_wgl_h_ 1
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
 /*
-** Copyright (c) 2013-2017 The Khronos Group Inc.
+** Copyright (c) 2013-2018 The Khronos Group Inc.
 **
 ** Permission is hereby granted, free of charge, to any person obtaining a
 ** copy of this software and/or associated documentation files (the
@@ -39,7 +39,7 @@
 #include <windows.h>
 #endif
 
-/* Generated on date 20170121 */
+/* Generated on date 20180819 */
 
 /* Generated C header for:
  * API: wgl
@@ -181,6 +181,11 @@
 #endif
 #endif /* WGL_ARB_create_context */
 
+#ifndef WGL_ARB_create_context_no_error
+#define WGL_ARB_create_context_no_error 1
+#define WGL_CONTEXT_OPENGL_NO_ERROR_ARB   0x31B3
+#endif /* WGL_ARB_create_context_no_error */
+
 #ifndef WGL_ARB_create_context_profile
 #define WGL_ARB_create_context_profile 1
 #define WGL_CONTEXT_PROFILE_MASK_ARB      0x9126
diff --git a/xml/Makefile b/xml/Makefile
index 35a4bda..2e2dbd9 100644
--- a/xml/Makefile
+++ b/xml/Makefile
@@ -38,7 +38,8 @@
 	     $(API)/GLES2/gl2ext.h \
 	     $(API)/GLES3/gl3.h
 GLXHEADERS = $(API)/GL/glxext.h
-WGLHEADERS = $(API)/GL/wglext.h
+WGLHEADERS = $(API)/GL/wglext.h \
+	     $(API)/GL/wgl.h
 ALLHEADERS = $(GLHEADERS) $(GLXHEADERS) $(WGLHEADERS)
 
 # Generated files to clean up