wreadln: return NULL instead of empty string

No wreadln() caller cares about an empty string.  Simplify the callers
by returning NULL instead of an allocated empty string.  This fixes
several memory leaks.

1 files changed, 3 insertions, 0 deletions

diff --git a/src/wreadln.c b/src/wreadln.c
index df5b55e8c..a382fcecc 100644
--- a/src/wreadln.c
+++ b/src/wreadln.c
@@ -603,6 +603,9 @@ _wreadln(WINDOW *w,
 		}
 	}
 
+	if (wr.line[0] == 0)
+		return NULL;
+
 	return g_strdup(wr.line);
 }