Use alloc_c_string() to convert String to char*

Using get_data() would sometimes result in the wrong data being written.

Fixes #12

CHANGELOG.md

@@ -13,6 +13,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Positioned background rect at 0,0 so it is no longer offset if a margin is added when Terminal is a child of a Container node.
 - Removed all pre-compiled binaries using BFG [Repo-Cleaner](https://rtyley.github.io/bfg-repo-cleaner/), thus re-writing git history.
 
+### Fixed
+- Fixed #12 where incorrect data would sometimes be written to the terminal when passing a string to the Terminal's `write()` method.
+
 ## [1.0.0] - 2020-10-05
 ### Added
 - Changelog.

addons/godot_xterm/native/src/terminal.cpp

@@ -585,9 +585,8 @@ void Terminal::write(Variant data)
 	case Variant::Type::STRING:
 	{
 		String string = data;
-		CharString utf8 = string.utf8();
-		u8 = utf8.get_data();
-		len = utf8.length();
+		u8 = string.alloc_c_string();
+		len = strlen(u8);
 		break;
 	}
 	default: