Fix PHPStan errors

Author: Hebbinkpro

src/Hebbinkpro/PocketMap/textures/model/CrossModel.php

@@ -76,7 +76,7 @@ public function getTopColors(GdImage $texture): array
                 if ($c === false) continue;
 
                 $index = imagecolorsforindex($texture, $c);
-                if (isset($index["alpha"]) && $index["alpha"] < 127) {
+                if ($index["alpha"] < 127) {
                     $color = $c;
                     break;
                 }

src/Hebbinkpro/PocketMap/utils/block/BlockDataValues.php

@@ -231,7 +231,8 @@ public static function getDoublePlantDataValue(int $blockId): int
             BlockTypeIds::GRASS => 2,
             BlockTypeIds::FERN => 3,
             BlockTypeIds::ROSE_BUSH => 4, // ROSE
-            BlockTypeIds::PEONY => 5 // PAEONIA
+            BlockTypeIds::PEONY => 5, // PAEONIA
+            default => 0
         };
     }