[sr-dev] new compiler warnings

'make' in master results on debian wheezy in the warnings shown below that i don't remember seeing before. -- juha CC (gcc) [kamailio] cfg/cfg_ctx.o cfg/cfg_ctx.c: In function 'cfg_set_now': cfg/cfg_ctx.c:490:5: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] cfg/cfg_ctx.c:494:5: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] cfg/cfg_ctx.c:564:4: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] cfg/cfg_ctx.c:564:4: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] cfg/cfg_ctx.c:565:5: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] cfg/cfg_ctx.c:584:5: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] cfg/cfg_ctx.c: In function 'cfg_commit': cfg/cfg_ctx.c:1125:5: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] cfg/cfg_ctx.c:1133:5: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] cfg/cfg_ctx.c:1185:5: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] cfg/cfg_ctx.c:1185:5: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] cfg/cfg_ctx.c:1190:5: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] cfg/cfg_ctx.c:1225:4: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] cfg/cfg_ctx.c:1226:5: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] cfg/cfg_ctx.c:1226:5: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] cfg/cfg_ctx.c:1228:5: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] cfg/cfg_ctx.c: In function 'cfg_add_group_inst': cfg/cfg_ctx.c:1582:2: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] cfg/cfg_ctx.c:1583:2: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] cfg/cfg_ctx.c:1585:2: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] cfg/cfg_ctx.c:1594:3: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] cfg/cfg_ctx.c: In function 'cfg_del_group_inst': cfg/cfg_ctx.c:1678:2: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] cfg/cfg_ctx.c:1679:2: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] cfg/cfg_ctx.c:1681:2: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] cfg/cfg_ctx.c:1692:5: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] cfg/cfg_ctx.c:1710:6: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] cfg/cfg_ctx.c:1712:6: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] cfg/cfg_ctx.c:1718:3: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]