Portability: format VCL_INT as intmax_t (%jd)

VCL_INT is int64_t, not long. Do as varnish does: cast to `intmax_t`.

src/vfp_brotli.c

@@ -777,15 +777,15 @@ vmod_encoder__init(VRT_CTX, struct vmod_brotli_encoder **encp,
 	AN(mode);
 
 	if (quality < BROTLI_MIN_QUALITY || quality > BROTLI_MAX_QUALITY) {
-		VFAIL(ctx, "new %s: quality %ld out of range (%d to %d)",
-		      vcl_name, quality, BROTLI_MIN_QUALITY,
+		VFAIL(ctx, "new %s: quality %jd out of range (%d to %d)",
+		      vcl_name, (intmax_t)quality, BROTLI_MIN_QUALITY,
 		      BROTLI_MAX_QUALITY);
 		return;
 	}
 
 	if (lgwin < BROTLI_MIN_WINDOW_BITS || lgwin > BROTLI_MAX_WINDOW_BITS) {
-		VFAIL(ctx, "new %s: lgwin %ld out of range (%d to %d)",
-		      vcl_name, lgwin, BROTLI_MIN_WINDOW_BITS,
+		VFAIL(ctx, "new %s: lgwin %jd out of range (%d to %d)",
+		      vcl_name, (intmax_t)lgwin, BROTLI_MIN_WINDOW_BITS,
 		      BROTLI_MAX_WINDOW_BITS);
 		return;
 	}