Fix memory leak

games/devtest/mods/testformspec/formspec.lua

@@ -1,12 +1,15 @@
 local color = minetest.colorize
 
+-- The "a" in this text is actually a cyrillic small a (\u0430)
+local unsafe_url = "https://u:p@wikipediа.org:1233/heIIoll?a=b#c"
+
 local clip_fs = [[
 	style_type[label,button,image_button,item_image_button,
 			tabheader,scrollbar,table,animated_image
 			,field,textarea,checkbox,dropdown;noclip=%c]
 
 	label[0,0;A clipping test]
-	button_url[0,1;3,0.8;clip_button;A clipping test;https://u:p@wikipediа.org:1233/heIIoll?a=b#c]
+	button_url[0,1;3,0.8;clip_button;A clipping test;]] .. unsafe_url .. [[]
 	image_button[0,2;3,0.8;testformspec_button_image.png;clip_image_button;A clipping test]
 	item_image_button[0,3;3,0.8;testformspec:item;clip_item_image_button;A clipping test]
 	tabheader[0,4.7;3,0.63;clip_tabheader;Clip,Test,Text,Tabs;1;false;false]
@@ -146,7 +149,7 @@ local hypertext_fs = "hypertext[0,0;11,9;hypertext;"..minetest.formspec_escape(h
 local style_fs = [[
 	style[one_btn1;bgcolor=red;textcolor=yellow;bgcolor_hovered=orange;
 		bgcolor_pressed=purple]
-	button_url[0,0;2.5,0.8;one_btn1;Button;https://u:p@wikipediа.org:1233/heIIoll?a=b#c]
+	button_url[0,0;2.5,0.8;one_btn1;Button;]] .. unsafe_url .. [[]
 
 	style[one_btn2;border=false;textcolor=cyan] ]]..
 	"button[0,1.05;2.5,0.8;one_btn2;Text " .. color("#FF0", "Yellow") .. [[]

src/gui/guiOpenURL.cpp

@@ -114,7 +114,6 @@ void GUIOpenURLMenu::regenerateGui(v2u32 screensize)
 		e->setTextAlignment(gui::EGUIA_UPPERLEFT, gui::EGUIA_UPPERLEFT);
 		e->setDrawBorder(true);
 		e->setDrawBackground(true);
-
 		e->setOverrideFont(mono_font);
 		e->drop();
 	}

src/util/colorize.cpp

@@ -99,6 +99,15 @@ bool colorize_url(std::string &out, const std::string &url) {
 	if (fragment)
 		os << "#" << fragment;
 
+	curl_free(fragment);
+	curl_free(host);
+	curl_free(password);
+	curl_free(path);
+	curl_free(port);
+	curl_free(query);
+	curl_free(scheme);
+	curl_free(user);
+	curl_free(zoneid);
 	curl_url_cleanup(h);
 	out = os.str();
 	return true;