Emscripten: Fixed memory leak if SDL_GetPrefPath() failed.
diff --git a/src/filesystem/emscripten/SDL_sysfilesystem.c b/src/filesystem/emscripten/SDL_sysfilesystem.c
index f5ea789..02471d3 100644
--- a/src/filesystem/emscripten/SDL_sysfilesystem.c
+++ b/src/filesystem/emscripten/SDL_sysfilesystem.c
@@ -57,6 +57,7 @@ SDL_GetPrefPath(const char *org, const char *app)
if (mkdir(retval, 0700) != 0 && errno != EEXIST) {
SDL_SetError("Couldn't create directory '%s': '%s'", retval, strerror(errno));
+ SDL_free(retval);
return NULL;
}