Allocate more space for the display buffer, as wide characters take up more room.

src/include/pv-internal.h

@@ -41,6 +41,7 @@ extern "C" {
 #define PV_SIZEOF_LASTWRITTEN_BUFFER	256
 #define PV_SIZEOF_PREVLINE_BUFFER	1024
 #define PV_FORMAT_ARRAY_MAX		100
+#define PV_SIZEOF_FORMAT_SEGMENTS_BUF	4096
 #define PV_SIZEOF_CRS_LOCK_FILE		1024
 
 #define PV_SIZEOF_FILE_FDINFO		4096