Update SDL to the latest source code (2.0.9 + e1e13e154128)

libs/SDL2/src/render/opengl/SDL_shaders_gl.c

@@ -340,11 +340,12 @@ CompileShader(GL_ShaderContext *ctx, GLhandleARB shader, const char *defines, co
     ctx->glCompileShaderARB(shader);
     ctx->glGetObjectParameterivARB(shader, GL_OBJECT_COMPILE_STATUS_ARB, &status);
     if (status == 0) {
+        SDL_bool isstack;
         GLint length;
         char *info;
 
         ctx->glGetObjectParameterivARB(shader, GL_OBJECT_INFO_LOG_LENGTH_ARB, &length);
-        info = SDL_stack_alloc(char, length+1);
+        info = SDL_small_alloc(char, length+1, &isstack);
         ctx->glGetInfoLogARB(shader, length, NULL, info);
         SDL_LogError(SDL_LOG_CATEGORY_RENDER,
             "Failed to compile shader:\n%s%s\n%s", defines, source, info);
@@ -352,7 +353,7 @@ CompileShader(GL_ShaderContext *ctx, GLhandleARB shader, const char *defines, co
         fprintf(stderr,
             "Failed to compile shader:\n%s%s\n%s", defines, source, info);
 #endif
-        SDL_stack_free(info);
+        SDL_small_free(info, isstack);
 
         return SDL_FALSE;
     } else {

libs/SDL2/src/render/opengl/SDL_shaders_gl.h

@@ -18,11 +18,16 @@
      misrepresented as being the original software.
   3. This notice may not be removed or altered from any source distribution.
 */
+
+#ifndef SDL_shaders_gl_h_
+#define SDL_shaders_gl_h_
+
 #include "../../SDL_internal.h"
 
 /* OpenGL shader implementation */
 
 typedef enum {
+    SHADER_INVALID = -1,
     SHADER_NONE,
     SHADER_SOLID,
     SHADER_RGB,
@@ -44,4 +49,6 @@ extern GL_ShaderContext * GL_CreateShaderContext(void);
 extern void GL_SelectShader(GL_ShaderContext *ctx, GL_Shader shader);
 extern void GL_DestroyShaderContext(GL_ShaderContext *ctx);
 
+#endif /* SDL_shaders_gl_h_ */
+
 /* vi: set ts=4 sw=4 expandtab: */