Change return type of `dc_is_configured' to bool

src/configure/mod.rs

@@ -45,16 +45,16 @@ pub unsafe fn configure(context: &Context) {
 }
 
 /// Check if the context is already configured.
-pub fn dc_is_configured(context: &Context) -> libc::c_int {
+pub fn dc_is_configured(context: &Context) -> bool {
     if context
         .sql
         .get_config_int(context, "configured")
         .unwrap_or_default()
         > 0
     {
-        1
+        true
     } else {
-        0
+        false
     }
 }