Minor problem in compiling Postgres 6.5.2

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POSTGRESQL BUG REPORT TEMPLATE
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Your name :Marc-Oliver Westerburg
Your email address :marc(dot)westerburg(at)post(dot)rwth-aachen(dot)de

System Configuration
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Architecture (example: Intel Pentium) :Intel Pentium 233 MMX

Operating System (example: Linux 2.0.26 ELF) :SuSE Linux 6.2 (kernel
2.2.10,
libc6, ELF)

PostgreSQL version (example: PostgreSQL-6.5.2): PostgreSQL-6.5.2

Compiler used (example: gcc 2.8.0) :gcc-2.95.1

Please enter a FULL description of your problem:
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When compiling src/backend/libpq/hba.c gcc exits with a
parse error in line 520 before remote_port.

Please describe a way to repeat the problem. Please try to provide a
concise reproducible example, if at all possible:
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just configure and make as described in INSTALL

If you know how this problem might be fixed, list the solution below:
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gcc doesn't like the ushort. I didn't check any header files for a
definition of ushort
but a simple "#define ushort unsigned short" at the beginning of the
file (src/backend/libpq/hba.c)
seems to solve the problem.