shithub: libgraphics

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add trivial nil checks to some of the cleanup procedures.

--- a/scene.c

+++ b/scene.c

@@ -117,6 +117,8 @@

 void

 delmodel(Model *m)

 {

+	if(m == nil)

+		return;

 	if(m->obj != nil)

 		objfree(m->obj);

 	if(m->tex != nil)

@@ -146,7 +148,10 @@

 void

 delentity(Entity *e)

 {

-	delmodel(e->mdl);

+	if(e == nil)

+		return;

+	if(e->mdl != nil)

+		delmodel(e->mdl);

 	free(e);

 }

@@ -176,6 +181,8 @@

 void

 delscene(Scene *s)

 {

+	if(s == nil)

+		return;

 	clearscene(s);

 	free(s->name);

 	free(s);

--- a/viewport.c

+++ b/viewport.c

@@ -52,6 +52,8 @@

 void

 rmviewport(Viewport *v)

 {

+	if(v == nil)

+		return;

 	rmfbctl(v->fbctl);

 	free(v);

 }