add an explicit include

fredrik-johansson · fredrik-johansson · commit f951da3181db · 2021-10-16T12:58:30.000+02:00
diff --git a/arb_fpwrap.h b/arb_fpwrap.h
@@ -18,6 +18,7 @@
 #define ARB_FPWRAP_INLINE static __inline__
 #endif
 
+#include "flint/double_extras.h"
 #include "arb.h"
 #include "acb.h"
 
