Added SdlResult and switched to StrBuf

src/sdl2/sdl.rs

@@ -1,5 +1,6 @@
 use std::mem;
 use std::str;
+use std::c_str::CString;
 
 // Setup linking for all targets.
 #[cfg(target_os="macos")]
@@ -113,9 +114,8 @@ pub fn was_inited(flags: InitFlag) -> InitFlag {
 
 pub fn get_error() -> String {
     unsafe {
-        let cstr = ll::SDL_GetError();
-
-        str::raw::from_c_str(mem::transmute_copy(&cstr))
+        let cstr = CString::new(ll::SDL_GetError(), false);
+        cstr.as_str().to_strbuf()
     }
 }