zprofile: adjust condition for `LESSOPEN` export

Split tests for condition for `export LESSOPEN` separate per convention

runcoms/zprofile

@@ -66,6 +66,6 @@ fi
 
 # Set the Less input preprocessor.
 # Try both `lesspipe` and `lesspipe.sh` as either might exist on a system.
-if [[ -z "$LESSOPEN" && (( $#commands[(i)lesspipe(|.sh)] )) ]]; then
+if [[ -z "$LESSOPEN" ]] && (( $#commands[(i)lesspipe(|.sh)] )); then
   export LESSOPEN="| /usr/bin/env $commands[(i)lesspipe(|.sh)] %s 2>&-"
 fi