fix warnings

fix warnings

regcomp.c:311:4: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long int’
regcomp.c:311:4: warning: format ‘%d’ expects argument of type ‘int’, but argument 4 has type ‘long int’
regcomp.c:311:4: warning: format ‘%d’ expects argument of type ‘int’, but argument 5 has type ‘long int’
regcomp.c:333:12: warning: comparison between signed and unsigned integer expressions
regcomp.c:542:2: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long int’
test2.c:16:3: warning: format ‘%lu’ expects argument of type ‘long unsigned int’, but argument 3 has type ‘char *’
test2.c:16:3: warning: format ‘%lu’ expects argument of type ‘long unsigned int’, but argument 4 has type ‘char *’
test2.c:16:3: warning: format ‘%lu’ expects argument of type ‘long unsigned int’, but argument 5 has type ‘char *’
test2.c:19:3: warning: format ‘%lu’ expects argument of type ‘long unsigned int’, but argument 3 has type ‘char *’
test2.c:19:3: warning: format ‘%lu’ expects argument of type ‘long unsigned int’, but argument 4 has type ‘char *’
test2.c:19:3: warning: format ‘%lu’ expects argument of type ‘long unsigned int’, but argument 5 has type ‘char *’
test2.c:7:10: warning: unused parameter ‘ac’
test2.c:7:21: warning: unused parameter ‘av’
test.c:28:10: warning: unused parameter ‘ac’
utf.c:159:8: warning: comparison between signed and unsigned integer expressions