Removed unnecessary includes of SDL_gfx header

Only surface.cpp actually uses SDL_gfx functions.

src/gmenu2x.cpp

@@ -56,7 +56,6 @@
 #include <unistd.h>
 #include <math.h>
 #include <SDL.h>
-#include <SDL_gfxPrimitives.h>
 #include <signal.h>
 
 #include <sys/statvfs.h>

src/imagedialog.cpp

@@ -25,7 +25,6 @@
 #include "utilities.h"
 
 #include <SDL.h>
-#include <SDL_gfxPrimitives.h>
 
 //for browsing the filesystem
 #include <sys/stat.h>

src/inputdialog.cpp

@@ -27,8 +27,6 @@
 #include "surface.h"
 #include "utilities.h"
 
-#include <SDL_gfxPrimitives.h>
-
 using namespace std;
 
 #define KEY_WIDTH 20

src/messagebox.cpp

@@ -22,8 +22,6 @@
 #include "gmenu2x.h"
 #include "surface.h"
 
-#include <SDL_gfxPrimitives.h>
-
 #include <unistd.h>
 
 using namespace std;

src/selector.cpp

@@ -29,7 +29,6 @@
 #include "utilities.h"
 
 #include <SDL.h>
-#include <SDL_gfxPrimitives.h>
 #include <algorithm>
 
 //for browsing the filesystem

src/settingsdialog.cpp

@@ -24,7 +24,6 @@
 #include "menusetting.h"
 
 #include <SDL.h>
-#include <SDL_gfxPrimitives.h>
 
 using namespace std;