resources: Plug a mem leak

resources: Plug a mem leak

==26427== 24 bytes in 1 blocks are definitely lost in loss record 608 of 965
==26427==    at 0x402AD89: malloc (vg_replace_malloc.c:236)
==26427==    by 0x4084724: standard_malloc (gmem.c:85)
==26427==    by 0x40847C7: g_malloc (gmem.c:159)
==26427==    by 0x409B1E1: g_slice_alloc (gslice.c:1003)
==26427==    by 0x40BC038: g_variant_get_child_value (gvariant-core.c:969)
==26427==    by 0x40BA89F: g_variant_valist_get (gvariant.c:4482)
==26427==    by 0x40BAC23: g_variant_get_va (gvariant.c:4681)
==26427==    by 0x40BAB29: g_variant_get (gvariant.c:4633)
==26427==    by 0x4228BA5: do_lookup (gresource.c:293)
==26427==    by 0x4228F51: g_resource_get_info (gresource.c:493)