Buffer and Log get overwriten every iteration of the loop

Because BUFFER and LOG are inside the loop each iteration they get set to the initial values, overwriting any value set by the corresponding option if there are later options set.

For example: simply adding `--log` will cause buffer to default to 10 even if some other value had been previously set.

checkvolumesize

@@ -33,12 +33,12 @@ EOF
 
 # Parse options
 POSITIONAL=()
+BUFFER=10
+LOG=false
+
 while [[ $# -gt 0 ]]; do
   key="$1"
 
-  BUFFER=10
-  LOG=false
-
   case $key in
       --help|-h|help)
         show_help