Cleanup: double promotion

Also remove null checks from args with non-null attribute.

source/blender/blenlib/intern/storage.c

@@ -232,7 +232,6 @@ int BLI_exists(const char *name)
 	if (res == -1) return(0);
 #else
 	struct stat st;
-	BLI_assert(name);
 	BLI_assert(!BLI_path_is_rel(name));
 	if (stat(name, &st)) return(0);
 #endif

source/blender/blenlib/intern/string.c

@@ -302,8 +302,6 @@ char *BLI_sprintfN(const char *__restrict format, ...)
 	va_list arg;
 	char *n;
 
-	BLI_assert(format != NULL);
-
 	va_start(arg, format);
 
 	ds = BLI_dynstr_new();

source/blender/editors/interface/interface_templates.c

@@ -3399,7 +3399,7 @@ static char *progress_tooltip_func(bContext *UNUSED(C), void *argN, const char *
 	BLI_timecode_string_from_time_simple(elapsed_str, sizeof(elapsed_str), elapsed);
 
 	if (progress) {
-		const double remaining = (elapsed / progress) - elapsed;
+		const double remaining = (elapsed / (double)progress) - elapsed;
 		BLI_timecode_string_from_time_simple(remaining_str, sizeof(remaining_str), remaining);
 	}
 

source/blender/render/intern/source/pipeline.c

@@ -1506,7 +1506,9 @@ static void do_render_3d(Render *re)
 	const int cfra_backup = re->scene->r.cfra;
 	const float subframe_backup = re->scene->r.subframe;
 
-	BKE_scene_frame_set(re->scene, (double)re->scene->r.cfra + re->scene->r.subframe + re->mblur_offs + re->field_offs);
+	BKE_scene_frame_set(
+	        re->scene, (double)re->scene->r.cfra + (double)re->scene->r.subframe +
+	        (double)re->mblur_offs + (double)re->field_offs);
 
 	/* init main render result */
 	main_render_result_new(re);