[gnumeric] Compilation: fix problem with prototyping gnumeric-supplied erfcl.

[Morten Welinder <mortenw src gnome org>]

commit eb039637a9e28f0228951f8dffbabbd9274e5199
Author: Morten Welinder <terra gnome org>
Date:   Sun Jan 23 11:07:19 2022 -0500

    Compilation: fix problem with prototyping gnumeric-supplied erfcl.

 src/numbers.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/numbers.h b/src/numbers.h
index ca3b80b75..7e31fa3c0 100644
--- a/src/numbers.h
+++ b/src/numbers.h
@@ -27,7 +27,7 @@ long double erfl (long double x);
 #endif
 
 #ifdef GNM_SUPPLIES_ERFCL
-long double erfl (long double x);
+long double erfcl (long double x);
 #endif
 
 typedef long double gnm_float;