Include stdlib.h in json-builder.c

ChromaticIsobar · ChromaticIsobar · commit fffd849bd03c · 2021-11-16T18:04:30.000+01:00
diff --git a/json-builder.c b/json-builder.c
@@ -32,6 +32,7 @@
 
 #include <string.h>
 #include <assert.h>
+#include <stdlib.h>
 #include <stdio.h>
 
 #ifdef _MSC_VER
