numeric.c: Add #error case

It's best to have a #error case when nothing in the #if #else series is
true, as it catches the problem at compile time.

1 files changed, 2 insertions, 0 deletions

diff --git a/numeric.c b/numeric.c
index d4e3493784..5d2fc5c756 100644
--- a/numeric.c
+++ b/numeric.c
@@ -66,6 +66,8 @@ S_strtod(pTHX_ const char * const s, char ** e)
 
     result = strtod(s, e);
 
+#  else
+#    error No strtod() equivalent found
 #  endif
 
     RESTORE_LC_NUMERIC();