build: Make -Werror=int-conversion fatal

This should hopefully avoid me accidentally passing NULL for an `int`
file descriptor in the future.

Closes: #431
Approved by: giuseppe

diff --git a/configure.ac b/configure.ac
index 18ab7b048a793cd4dcd82b07b0d3f4a434ffc61c..4831bcc4adaa1310bb6f2bed43e1004041ed05aa 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -27,6 +27,7 @@ CC_CHECK_FLAGS_APPEND([WARN_CFLAGS], [CFLAGS], [\
         -Werror=missing-declarations \
         -Werror=return-type \
         -Werror=overflow \
+        -Werror=int-conversion \
        -Werror=missing-include-dirs -Werror=aggregate-return \
        -Werror=declaration-after-statement \
 ])