Replace type resolution assertions with failures

Type resolution now supports failing, but some assertions are still
left over from when it didn't. Replace some of those which now fail
on LDK 0.0.115.

Author: TheBlueMatt

c-bindings-gen/src/types.rs

@@ -2685,10 +2685,16 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> {
 			} else if let syn::Type::Path(p_arg) = t {
 				if let Some(resolved) = self.maybe_resolve_path(&p_arg.path, generics) {
 					if !self.is_primitive(&resolved) {
-						assert!(!is_ref); // We don't currently support outer reference types for non-primitive inners
+						if is_ref {
+							// We don't currently support outer reference types for non-primitive inners
+							return false;
+						}
 					}
 				} else {
-					assert!(!is_ref); // We don't currently support outer reference types for non-primitive inners
+					if is_ref {
+						// We don't currently support outer reference types for non-primitive inners
+						return false;
+					}
 				}
 				if !self.write_c_type_intern(w, t, generics, false, false, false, true, true) { return false; }
 			} else {