fix a bug in reading the boolean environment variable
fix a bug in reading the boolean environment variable

Reddine/dzlibs,Reddine/dzlibs,01walid/dzlibs,benyassine/dzlibs,abougouffa/dzlibs,Taybo/dzlibs,abougouffa/dzlibs,breda/dzlibs,Taybo/dzlibs,Reddine/dzlibs,Taybo/dzlibs,01walid/dzlibs,breda/dzlibs,benyassine/dzlibs,breda/dzlibs,01walid/dzlibs,benyassine/dzlibs,mohamed-io/dzlibs,benyassine/dzlibs,abougouffa/dzlibs,mohamed-io/dzlibs,mohamed-io/dzlibs