Clean.c: In function ‘CleanZImage’:
Clean.c:141:23: warning: declaration of ‘j’ shadows a previous local [-Wshadow=local]
       register int i, j;
                       ^
Clean.c:88:16: note: shadowed declaration is here
   unsigned int j;
                ^
Clean.c: In function ‘CopyAndCleanImage’:
Clean.c:239:22: warning: declaration of ‘i’ shadows a previous local [-Wshadow=compatible-local]
         register int i;
                      ^
Clean.c:192:16: note: shadowed declaration is here
   register int i;
                ^
Clean.c:324:13: warning: declaration of ‘i’ shadows a previous local [-Wshadow=compatible-local]
         int i;
             ^
Clean.c:192:16: note: shadowed declaration is here
   register int i;
                ^