Fix up SDL2 include paths

Using "SDL2/SDL_xxx.h" instead of "SDL_xxx.h" caused
the include paths provided by pkg-config to be ignored,
and headers from a standard include path to be used instead.

src/audio.cpp

@@ -36,9 +36,9 @@
 #include <QByteArray>
 #include <QHash>
 
-#include "SDL2/SDL_thread.h"
+#include "SDL_thread.h"
 
-//#include "SDL2/SDL_mixer.h"
+//#include "SDL_mixer.h"
 
 #include <QDebug>
 

src/bitmap.cpp

@@ -21,10 +21,10 @@
 
 #include "bitmap.h"
 
-#include "SDL2/SDL.h"
-#include "SDL2/SDL_image.h"
-#include "SDL2/SDL_ttf.h"
-#include "SDL2/SDL_rect.h"
+#include "SDL.h"
+#include "SDL_image.h"
+#include "SDL_ttf.h"
+#include "SDL_rect.h"
 
 #include "pixman.h"
 

src/etc.cpp

@@ -24,8 +24,8 @@
 #include "serial-util.h"
 #include "exception.h"
 
-#include "SDL2/SDL_types.h"
-#include "SDL2/SDL_pixels.h"
+#include "SDL_types.h"
+#include "SDL_pixels.h"
 
 Color::Color(double red, double green, double blue, double alpha)
 	: red(red), green(green), blue(blue), alpha(alpha)

src/eventthread.cpp

@@ -21,11 +21,11 @@
 
 #include "eventthread.h"
 
-#include "SDL2/SDL_events.h"
-#include "SDL2/SDL_joystick.h"
-#include "SDL2/SDL_messagebox.h"
-#include "SDL2/SDL_timer.h"
-#include "SDL2/SDL_thread.h"
+#include "SDL_events.h"
+#include "SDL_joystick.h"
+#include "SDL_messagebox.h"
+#include "SDL_timer.h"
+#include "SDL_thread.h"
 
 #include "sharedstate.h"
 #include "graphics.h"

src/eventthread.h

@@ -25,11 +25,11 @@
 #include "config.h"
 #include "etc-internal.h"
 
-#include "SDL2/SDL_scancode.h"
-#include "SDL2/SDL_joystick.h"
-#include "SDL2/SDL_mouse.h"
+#include "SDL_scancode.h"
+#include "SDL_joystick.h"
+#include "SDL_mouse.h"
 
-#include "SDL2/SDL_mutex.h"
+#include "SDL_mutex.h"
 
 #include <QByteArray>
 #include <QVector>

src/filesystem.h

@@ -24,7 +24,7 @@
 
 #include "SFML/System/InputStream.hpp"
 
-#include "SDL2/SDL_rwops.h"
+#include "SDL_rwops.h"
 
 struct PHYSFS_File;
 

src/font.cpp

@@ -27,7 +27,7 @@
 
 #include "../liberation.ttf.xxd"
 
-#include "SDL2/SDL_ttf.h"
+#include "SDL_ttf.h"
 
 #include <QHash>
 #include <QByteArray>

src/glstate.cpp

@@ -21,7 +21,7 @@
 
 #include "glstate.h"
 #include "GL/glew.h"
-#include "SDL2/SDL_rect.h"
+#include "SDL_rect.h"
 #include "etc.h"
 
 void GLClearColor::apply(const Vec4 &value)

src/graphics.cpp

@@ -35,8 +35,8 @@
 #include "binding.h"
 #include "perftimer.h"
 
-#include "SDL2/SDL_video.h"
-#include "SDL2/SDL_timer.h"
+#include "SDL_video.h"
+#include "SDL_timer.h"
 
 struct PingPong
 {

src/input.cpp

@@ -25,8 +25,8 @@
 #include "exception.h"
 #include "util.h"
 
-#include "SDL2/SDL_scancode.h"
-#include "SDL2/SDL_mouse.h"
+#include "SDL_scancode.h"
+#include "SDL_mouse.h"
 
 #include <QVector>
 #include "string.h"

src/main.cpp

@@ -21,9 +21,9 @@
 
 #include "GL/glew.h"
 
-#include "SDL2/SDL.h"
-#include "SDL2/SDL_image.h"
-#include "SDL2/SDL_ttf.h"
+#include "SDL.h"
+#include "SDL_image.h"
+#include "SDL_ttf.h"
 
 #include "sharedstate.h"
 #include "eventthread.h"

src/perftimer.cpp

@@ -1,6 +1,6 @@
 #include "perftimer.h"
 
-#include "SDL2/SDL_timer.h"
+#include "SDL_timer.h"
 #include "GL/glew.h"
 
 #include <QDebug>

src/tilemap.cpp

@@ -41,7 +41,7 @@
 
 #include <QVector>
 
-#include <SDL2/SDL_surface.h>
+#include "SDL_surface.h"
 
 extern const StaticRect autotileRects[];
 

src/viewport.cpp

@@ -27,7 +27,7 @@
 #include "quad.h"
 #include "glstate.h"
 
-#include "SDL2/SDL_rect.h"
+#include "SDL_rect.h"
 
 #include "sigc++/connection.h"