Suppress GCC 6 warning about self-comparison

Back-patch commit a2fd62dd53fb606dee69e0f4eb12289c87f5c8b1
into older branches.  Per complaint from Pavel Stehule.

diff --git a/src/port/path.c b/src/port/path.c
index 3c633a786bbb5eb32cdf20f35639ca377f565d1a..32d6c1c80d5aeb0bad3937be6e94cbec7beb4a1b 100644 (file)
--- a/src/port/path.c
+++ b/src/port/path.c
@@ -86,7 +86,11 @@ skip_drive(const char *path)
 bool
 has_drive_prefix(const char *path)
 {
+#ifdef WIN32
    return skip_drive(path) != path;
+#else
+   return false;
+#endif
 }
 
 /*