Use #ifdef to test STDC_HEADERS.

diff --git a/src/doprnt.c b/src/doprnt.c
index 2b988acea5c87906dd96ab297b9b4098bf56a782..162953895139d465270367c796d60889dbdac6b7 100644 (file)
--- a/src/doprnt.c
+++ b/src/doprnt.c
@@ -25,7 +25,7 @@ Boston, MA 02111-1307, USA.  */
 #include <stdio.h>
 #include <ctype.h>
 
-#if STDC_HEADERS
+#ifdef STDC_HEADERS
 #include <float.h>
 #endif