compiler: let methods return voidptr without a segfault

compiler/gen_c.v

@@ -238,9 +238,13 @@ fn (p mut Parser) gen_method_call(receiver_type, ftyp string, cgen_name string,
 	// Method returns (void*) => cast it to int, string, user etc
 	// number := *(int*)numbers.first()
 	if ftyp == 'void*' {
-		// array_int => int
-		cast = receiver_type.all_after('_')
-		cast = '*($cast*) '
+		if receiver_type.starts_with('array_') {
+			// array_int => int
+			cast = receiver_type.all_after('_')
+			cast = '*($cast*) '
+		}else{
+			cast = '(voidptr) '
+		}
 	}
 	p.cgen.set_placeholder(method_ph, '$cast $method_call')
 	//return method_call

compiler/tests/return_voidptr_test.v

@@ -0,0 +1,23 @@
+
+struct Zest { val int }
+    
+fn (t Zest) get_a_finger_to_the_moon() voidptr {
+	return voidptr(0)
+}
+
+fn get_the_dao_way() voidptr {
+	return voidptr(0)
+}
+        
+fn test_returning_a_void_pointer_from_a_method() {
+	t := &Zest{ val: 123 }	
+	z := voidptr(0)
+	assert z == t.get_a_finger_to_the_moon()
+	assert t.get_a_finger_to_the_moon() == 0
+}
+
+fn test_returning_a_void_pointer_from_a_function() {
+	z := voidptr(0)
+	assert z == get_the_dao_way()
+	assert get_the_dao_way() == 0
+}