Implemented some utility functions.

main.go

@@ -121,8 +121,5 @@ func doOnShouldQuit(unused unsafe.Pointer) C.int {
 	if shouldQuitFunc == nil {
 		return 0
 	}
-	if shouldQuitFunc() {
+	return frombool(shouldQuitFunc())
-		return 1
-	}
-	return 0
 }

util.go

@@ -0,0 +1,25 @@
+// 12 december 2015
+
+package ui
+
+import (
+	"unsafe"
+)
+
+// #include <stdlib.h>
+import "C"
+
+func freestr(str *C.char) {
+	C.free(unsafe.Pointer(str))
+}
+
+func tobool(b C.int) bool {
+	return b != 0
+}
+
+func frombool(b bool) C.int {
+	if b {
+		return 1
+	}
+	return 0
+}