cppcheck style findings #213

Static code check findings are (severity: slight/cosmetic):
[crypt_blowfish.c:390]: (style) The scope of the variable 'tmp' can be reduced.
[crypt_blowfish.c:390]: (style) The scope of the variable 'c1' can be reduced.
[crypt_blowfish.c:414]: (style) The scope of the variable 'c1' can be reduced.
[crypt_blowfish.c:414]: (style) The scope of the variable 'c2' can be reduced.
[crypt_blowfish.c:445]: (style) The scope of the variable 'tmp' can be reduced.
crypt_blowfish.c:364:31: style: Use pointers to const when referring to string literals [cert-STR05-C]
crypt_gensalt.c:31:28: style: Use pointers to const when referring to string literals [cert-STR05-C]
crypt_gensalt.h:20 : style: const