Fix comment handling for multiline input (Savannah #71186):

Overwrite \0 in next input line, or all following input will be lost.


git-svn-id: http://root.cern.ch/svn/root/trunk@34745 27541ba8-7e3a-0410-8455-c3a389f83636

cint/cint/src/pause.cxx

@@ -1426,6 +1426,7 @@ readagain:
                if ('/' == com[i+1]) {
                   com[i] = 0;
                   com[i+1] = 0;
+                  --i;
                }
             }
             break;