compositor-wayland: free 'theme' config option value

Signed-off-by: U. Artie Eoff <ullysses.a.eoff@intel.com>
diff --git a/src/compositor-wayland.c b/src/compositor-wayland.c
index 8ddc8bc..899c329 100644
--- a/src/compositor-wayland.c
+++ b/src/compositor-wayland.c
@@ -1427,6 +1427,8 @@
 
 	c->cursor_theme = wl_cursor_theme_load(theme, size, c->parent.shm);
 
+	free(theme);
+
 	c->cursor = NULL;
 	for (i = 0; !c->cursor && i < ARRAY_LENGTH(left_ptrs); ++i)
 		c->cursor = wl_cursor_theme_get_cursor(c->cursor_theme,