Refactor get_haiku()

quickget

@@ -1430,16 +1430,18 @@ function get_garuda() {
 }
 
 function get_haiku() {
+    local BASE=""
     local ISO=""
     local URL=""
     local HASH=""
 
     validate_release "releases_haiku"
 
+    BASE=$(echo "${RELEASE}" | cut -d'-' -f1)
+    URL="https://cdn.haiku-os.org/haiku-release/${BASE}"
     ISO="haiku-${RELEASE}-anyboot.iso"
-    URL="https://cdn.haiku-os.org/haiku-release/$(echo $RELEASE | awk -F '-' '{print $1}')/${ISO}"
-    HASH=$(wget -q -O- ${URL}.sha256 | grep "${ISO}" | cut -d' ' -f4)
-    web_get "${URL}" "${VM_PATH}"
+    HASH=$(wget -q -O- "${URL}/${ISO}.sha256" | grep "${ISO}" | cut -d' ' -f4)
+    web_get "${URL}/${ISO}" "${VM_PATH}"
     check_hash "${ISO}" "${HASH}"
     make_vm_config "${ISO}"
 }