Use test -r instead of test -e for solaris. Fixes bug #4253.

[chaz/openbox] / data / xbm / max.xbm

#define max_width 6
#define max_height 6
static unsigned char max_bits[] = {
   0x3f, 0x3f, 0x21, 0x21, 0x21, 0x3f };