Don't back up if no match found

plugin/surround.vim

@@ -425,8 +425,10 @@ function! s:dosurround(...) " {{{1
     else
         exe 'norm d'.strcount.'i'.char
         " One character backwards
+        if getreg('"') != ""
             call search('.','bW')
         endif
+    endif
     let keeper = getreg('"')
     let okeeper = keeper " for reindent below
     if keeper == ""