[PATCH] Win32: make buildable with MinGW-w64 gcc

[Kouhei Sutou]

Hi,

The attached patch fixes the following warning:

    x86_64-w64-mingw32-gcc -c -pipe  -O -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -I src/core -I src/event -I src/event/modules -I src/os/win32 -I objs \
            -o objs/src/core/ngx_connection.o \
            src/core/ngx_connection.c
    src/core/ngx_connection.c: In function 'ngx_close_idle_connections':
    src/core/ngx_connection.c:1178:21: error: comparison between signed and unsigned integer expressions [-Werror=sign-compare]
             if (c[i].fd != -1 && c[i].idle) {
                         ^
    cc1: all warnings being treated as errors

Thanks,
--
kou
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