render/egl: fix NULL dereference when using llvmpipe
Fixes: ("render/egl: fail to create wlr_egl on software renderer")
@@ -274,7 +274,7 @@ struct wlr_egl *wlr_egl_create(EGLenum platform, void *remote_display,
if (check_egl_ext(device_exts_str, "EGL_MESA_device_software")) {
const char *allow_software = getenv("WLR_RENDERER_ALLOW_SOFTWARE");
- if (strcmp(allow_software, "1") == 0) {
+ if (allow_software != NULL && strcmp(allow_software, "1") == 0) {
wlr_log(WLR_INFO, "Using software rendering");
} else {
wlr_log(WLR_ERROR, "Software rendering detected, please use "
