this was harmless but not nice nevertheless.

Clipboard.c: In function ‘nxagentConvertSelection’:
Clipboard.c:1850:9: warning: declaration of ‘i’ shadows a previous local [-Wshadow=compatible-local]
     int i = nxagentFindCurrentSelectionIndex(selection);
         ^
Clipboard.c:1736:7: note: shadowed declaration is here
   int i = nxagentFindCurrentSelectionIndex(selection);
       ^