appimage: Use command -v instead of which (sc2230)

cmake/linux/launch_lmms.sh

@@ -1,8 +1,9 @@
 #!/usr/bin/env bash
+alias standard_which="command -v"
 DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 export PATH="$PATH:/sbin"
-if which carla > /dev/null 2>&1; then
-   CARLAPATH="$(which carla)"
+if standard_which carla > /dev/null 2>&1; then
+   CARLAPATH="$(standard_which carla)"
    CARLAPREFIX="${CARLAPATH%/bin*}"
    echo "Carla appears to be installed on this system at $CARLAPREFIX/lib[64]/carla so we'll use it."
    export LD_LIBRARY_PATH=$CARLAPREFIX/lib/carla:$CARLAPREFIX/lib64/carla:$LD_LIBRARY_PATH