change playerless sentinel check to check for a player and not just an entity

Author: SamsTheNerd

Common/src/main/java/at/petrak/hexcasting/common/casting/actions/spells/sentinel/OpCreateSentinel.kt

@@ -20,7 +20,7 @@ class OpCreateSentinel(val extendsRange: Boolean) : SpellAction {
             args: List<Iota>,
             env: CastingEnvironment
     ): SpellAction.Result {
-        if (env.castingEntity == null)
+        if (env.castingEntity !is ServerPlayer)
             throw MishapBadCaster()
 
         val target = args.getVec3(0, argc)

Common/src/main/java/at/petrak/hexcasting/common/casting/actions/spells/sentinel/OpDestroySentinel.kt

@@ -17,7 +17,7 @@ object OpDestroySentinel : SpellAction {
             args: List<Iota>,
             env: CastingEnvironment
     ): SpellAction.Result {
-        if (env.castingEntity == null)
+        if (env.castingEntity !is ServerPlayer)
             throw MishapBadCaster()
 
         val sentinel = IXplatAbstractions.INSTANCE.getSentinel(env.castingEntity as? ServerPlayer)

Common/src/main/java/at/petrak/hexcasting/common/casting/actions/spells/sentinel/OpGetSentinelPos.kt

@@ -15,7 +15,7 @@ object OpGetSentinelPos : ConstMediaAction {
     override val argc = 0
     override val mediaCost: Long = MediaConstants.DUST_UNIT / 10
     override fun execute(args: List<Iota>, env: CastingEnvironment): List<Iota> {
-        if (env.castingEntity == null)
+        if (env.castingEntity !is ServerPlayer)
             throw MishapBadCaster()
 
         val sentinel = IXplatAbstractions.INSTANCE.getSentinel(env.castingEntity as? ServerPlayer) ?: return listOf(NullIota())

Common/src/main/java/at/petrak/hexcasting/common/casting/actions/spells/sentinel/OpGetSentinelWayfind.kt

@@ -18,7 +18,7 @@ object OpGetSentinelWayfind : ConstMediaAction {
     override val argc = 1
     override val mediaCost: Long = MediaConstants.DUST_UNIT / 10
     override fun execute(args: List<Iota>, env: CastingEnvironment): List<Iota> {
-        if (env.castingEntity == null)
+        if (env.castingEntity !is ServerPlayer)
             throw MishapBadCaster()
 
         val from = args.getVec3(0, argc)