ExtendedZoneProcessor.h: Copy one fewer byte than kAbbrevSize, to quash compiler warning? (See #107)

Author: bxparks

src/ace_time/ExtendedZoneProcessor.h

@@ -1248,7 +1248,7 @@ class ExtendedZoneProcessorTemplate: public ZoneProcessor {
           }
         } else {
           // Just copy the FORMAT disregarding deltaMinutes and letterString.
-          strncpy(dest, format, destSize);
+          strncpy(dest, format, destSize - 1);
           dest[destSize - 1] = '\0';
         }
       }