str: fix tests on unsigned chars, and !HAVE_ISBLANK.

[ccan] / ccan / str / test / compile_fail-isprint.c

diff --git a/ccan/str/test/compile_fail-isprint.c b/ccan/str/test/compile_fail-isprint.c
index 30f7639c42ea3704a67ded1fb5ec207a9ca7ba92..6432e41d2b7db9db5ddc0ecd35611fcc169e49d3 100644 (file)
--- a/ccan/str/test/compile_fail-isprint.c
+++ b/ccan/str/test/compile_fail-isprint.c
@@ -15,8 +15,7 @@ int main(int argc, char *argv[])
 
 #ifdef FAIL
        /* Fake fail on unsigned char platforms. */
-       c = 255;
-       BUILD_ASSERT(c < 0);
+       BUILD_ASSERT((char)255 < 0);
 #endif
 
        return isprint(c);