Fix PW_TYPE_FILE_INPUT handling in cf_item_parse
This fixes the following Coverity issues:
Error: DEADCODE (CWE-561):
freeradius-server-3.0.4/src/main/conffile.c:1002: assignment: Assigning: "type" &= "255".
freeradius-server-3.0.4/src/main/conffile.c:1041: between: When switching on "type", the value of "type" must be between 0 and 255.
freeradius-server-3.0.4/src/main/conffile.c:1167: dead_error_condition: The switch value "type" cannot be "16385".
freeradius-server-3.0.4/src/main/conffile.c:1167: dead_error_line: Execution cannot reach this statement: "case 16385:".
Error: DEADCODE (CWE-561):
freeradius-server-3.0.4/src/main/conffile.c:1002: assignment: Assigning: "type" &= "255".
freeradius-server-3.0.4/src/main/conffile.c:1041: between: When switching on "type", the value of "type" must be between 0 and 255.
freeradius-server-3.0.4/src/main/conffile.c:1168: dead_error_condition: The switch value "type" cannot be "32769".
freeradius-server-3.0.4/src/main/conffile.c:1168: dead_error_begin: Execution cannot reach this statement: "case 32769:".
Resolves: Bug#1120234