* dln.c: newer BeOS support. a patch from Pete Goodeve

<pete.goodeve at computer.org> in [ruby-core:18712].

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@19426 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

numeric.c

@@ -78,6 +78,9 @@ round(double x)
     }
     return x;
 }
+#elif defined(__BEOS__)
+/* appears to be a bug in the BeOS headers */
+double round(double x);
 #endif
 
 static ID id_coerce, id_to_i, id_eq;