Pointer as bool (libsdl-org#7214)

test/testshader.c

@@ -141,7 +141,7 @@ static SDL_bool CompileShader(GLhandleARB shader, const char *source)
 
         glGetObjectParameterivARB(shader, GL_OBJECT_INFO_LOG_LENGTH_ARB, &length);
         info = (char *)SDL_malloc((size_t)length + 1);
-        if (info == NULL) {
+        if (!info) {
             SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Out of memory!");
         } else {
             glGetInfoLogARB(shader, length, NULL, info);
@@ -169,7 +169,7 @@ static SDL_bool LinkProgram(ShaderData *data)
 
         glGetObjectParameterivARB(data->program, GL_OBJECT_INFO_LOG_LENGTH_ARB, &length);
         info = (char *)SDL_malloc((size_t)length + 1);
-        if (info == NULL) {
+        if (!info) {
             SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Out of memory!");
         } else {
             glGetInfoLogARB(data->program, length, NULL, info);
@@ -327,7 +327,7 @@ SDL_GL_LoadTexture(SDL_Surface *surface, GLfloat *texcoord)
     texcoord[3] = (GLfloat)surface->h / h; /* Max Y */
 
     image = SDL_CreateSurface(w, h, SDL_PIXELFORMAT_RGBA32);
-    if (image == NULL) {
+    if (!image) {
         return 0;
     }
 
@@ -454,7 +454,7 @@ int main(int argc, char **argv)
 
     /* Initialize test framework */
     state = SDLTest_CommonCreateState(argv, 0);
-    if (state == NULL) {
+    if (!state) {
         return 1;
     }
 
@@ -489,7 +489,7 @@ int main(int argc, char **argv)
 
     /* Create a 640x480 OpenGL screen */
     window = SDL_CreateWindow("Shader Demo", 640, 480, SDL_WINDOW_OPENGL);
-    if (window == NULL) {
+    if (!window) {
         SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Unable to create OpenGL window: %s\n", SDL_GetError());
         SDL_Quit();
         exit(2);
@@ -505,7 +505,7 @@ int main(int argc, char **argv)
     surface = SDL_LoadBMP(filename);
     SDL_free(filename);
 
-    if (surface == NULL) {
+    if (!surface) {
         SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Unable to load icon.bmp: %s\n", SDL_GetError());
         SDL_Quit();
         exit(3);