Clean up many strdups

src/memory.c

@@ -3,7 +3,7 @@
 
 #include <stddef.h>
 #include <stdlib.h>
-
+#include <string.h>
 
 static struct ucl_object *ucl_object_alloc();
 
@@ -28,7 +28,7 @@ struct ucl_object *ucl_symbol_create(const char *symbol)
 {
     struct ucl_object* obj = ucl_object_alloc();
     obj->type = UCL_TYPE_SYMBOL;
-    obj->symbol = symbol;
+    obj->symbol = strdup(symbol);
     return obj;
 }
 
@@ -36,7 +36,7 @@ struct ucl_object *ucl_string_create(const char *string)
 {
     struct ucl_object* obj = ucl_object_alloc();
     obj->type = UCL_TYPE_STRING;
-    obj->string = string;
+    obj->string = strdup(string);
     return obj;
 }
 
@@ -44,7 +44,7 @@ struct ucl_object *ucl_error_create(const char *error)
 {
     struct ucl_object* obj = ucl_object_alloc();
     obj->type = UCL_TYPE_ERROR;
-    obj->error = error;
+    obj->error = strdup(error);
     return obj;
 }