Add missing header for setenv().

diff --git a/src/exif-common.cc b/src/exif-common.cc
index a4d0432..62170e7 100644 (file)
--- a/src/exif-common.cc
+++ b/src/exif-common.cc
@@ -19,6 +19,8 @@
 
 #include <config.h>
 
+#include <stdlib.h>
+
 #define _XOPEN_SOURCE
 
 #include <string.h>