afl: avoid infinite loop with big numbers
afl: avoid infinite loop with big numbers

... for which x - 1.0 == x due to rounding.

Change-Id: I98930077a5b47dc9e49ae6ac78e6b19177c7b56c

LibreOffice/libcdr,LibreOffice/libcdr,LibreOffice/libcdr,LibreOffice/libcdr