return incomplete string rather than nothing

1 files changed, 2 insertions, 1 deletions

diff --git a/js/png.js b/js/png.js
index 3c165dc..df9960c 100644
--- a/js/png.js
+++ b/js/png.js
@@ -173,7 +173,8 @@ var read_cstring = function(u8, pos){
     if (u8[pos] === 0) return str
     str += String.fromCharCode(u8[pos])
     pos++
-  } 
+  }
+  return str
 }
 
 var decode_itxt_chunk = function(chunk){