egl: make an int into an SDL_bool.

src/video/SDL_egl.c

@@ -546,7 +546,7 @@ SDL_EGL_LoadLibrary(_THIS, const char *egl_path, NativeDisplayType native_displa
     /* Get the EGL version with a valid egl_display, for EGL <= 1.4 */
     SDL_EGL_GetVersion(_this);
 
-    _this->egl_data->is_offscreen = 0;
+    _this->egl_data->is_offscreen = SDL_FALSE;
 
     return 0;
 }
@@ -634,7 +634,7 @@ SDL_EGL_InitializeOffscreen(_THIS, int device)
     /* Get the EGL version with a valid egl_display, for EGL <= 1.4 */
     SDL_EGL_GetVersion(_this);
 
-    _this->egl_data->is_offscreen = 1;
+    _this->egl_data->is_offscreen = SDL_TRUE;
 
     return 0;
 }

src/video/SDL_egl_c.h

@@ -117,8 +117,7 @@ typedef struct SDL_EGL_VideoData
 
 
     /* whether EGL display was offscreen */
-    int is_offscreen;
-
+    SDL_bool is_offscreen;
 } SDL_EGL_VideoData;
 
 /* OpenGLES functions */