Issue #68: use -std=gnu99 because some versions of gcc seem to think that -std=c99 also implies -ansi, which causes warnings and build breakage.
Issue #68: use -std=gnu99 because some versions of gcc seem to think that -std=c99 also implies -ansi, which causes warnings and build breakage.

CyanogenMod/android_external_json-c,cubieb/json-c,Amineahd/json-c,servkey/libjson,PureSwift/json-c,haoranzeus/json-c,chenha0/json-c,Nzbuu/json-c,Distrotech/json-c,colemancda/json-c,Nzbuu/json-c,Nzbuu/json-c,CyanogenMod/android_external_json-c,haoranzeus/json-c,UAVmatrix/json-c,chenha0/json-c,rgerhards/json-c,PureSwift/json-c,Amineahd/json-c,rgerhards/json-c,alagoutte/json-c,Distrotech/json-c,alagoutte/json-c,PureSwift/json-c,rgerhards/json-c,Distrotech/json-c,chenha0/json-c,haoranzeus/json-c,CyanogenMod/android_external_json-c,Amineahd/json-c,cubieb/json-c,Nzbuu/json-c,servkey/libjson,UAVmatrix/json-c,colemancda/json-c,CyanogenMod/android_external_json-c,alagoutte/json-c,PureSwift/json-c,UAVmatrix/json-c,UAVmatrix/json-c,Distrotech/json-c,cubieb/json-c,colemancda/json-c,servkey/libjson