hal: free tmp_val in one missing case

Pointed out by coverity scan.

Signed-off-by: Dave Airlie <[email protected]>
Reviewed-by: Daniel Stone <[email protected]>
(cherry picked from commit 8d3731a)

Author: airlied

config/hal.c

@@ -355,6 +355,7 @@ device_added(LibHalContext *hal_ctx, const char *udi)
                         if (!strcasecmp(tmp, ".options") && (!xkb_opts.options))
                             xkb_opts.options = strdup(tmp_val);
                     }
+                    free(tmp_val);
                 }
             }
         }