ios_vout: Build fix.

configure.ac

@@ -3358,6 +3358,7 @@ AC_ARG_ENABLE(ios-vout,
 if test "${enable_ios_vout}" = "yes"
 then
   VLC_ADD_PLUGIN([vout_ios])
+  VLC_ADD_CFLAGS([vout_ios], [-DUSE_OPENGL_ES=1])
   VLC_ADD_LDFLAGS([vout_ios], [-Wl,-framework,OpenGLES,-framework,QuartzCore,-framework,UIKit,-framework,Foundation])
 fi
 

modules/video_output/ios.m

@@ -27,6 +27,8 @@
 
 #import <UIKit/UIKit.h>
 #import <OpenGLES/ES1/gl.h>
+#import <OpenGLES/ES1/glext.h>
+#include <QuartzCore/QuartzCore.h>
 
 #ifdef HAVE_CONFIG_H
 # include "config.h"
@@ -38,8 +40,8 @@
 #include <vlc_vout_opengl.h>
 
 #define USE_OPENGL_ES 1
+
 #include "opengl.h"
-#include <QuartzCore/QuartzCore.h>
 
 /**
  * Forward declarations