[krbdev.mit.edu #3915] krb5-1.5: fix warnings in lib/crypto

[Public Submitter via RT]

warning fix for:
old_api_glue.c: In function 'krb5_encrypt':
old_api_glue.c:49: warning: assignment discards qualifiers from 
pointer target type
old_api_glue.c: In function 'krb5_decrypt':
old_api_glue.c:85: warning: assignment discards qualifiers from 
pointer target type
old_api_glue.c: In function 'krb5_calculate_checksum':
old_api_glue.c:206: warning: assignment discards qualifiers from 
pointer target type
old_api_glue.c:210: warning: assignment discards qualifiers from 
pointer target type
old_api_glue.c: In function 'krb5_verify_checksum':
old_api_glue.c:242: warning: assignment discards qualifiers from 
pointer target type
old_api_glue.c:246: warning: assignment discards qualifiers from 
pointer target type

pbkdf2.c:86: warning: pointer targets in assignment differ in 
signedness

prng.c:33: warning: 'init_error' defined but not used