Fix count of drawing

src/PhpSpreadsheet/Writer/Xlsx.php

@@ -335,7 +335,7 @@ class Xlsx extends BaseWriter
         if ($this->spreadSheet->hasInCellDrawings()) {
             $richDataDrawing = new RichDataDrawing();
             $richDataFiles = $richDataDrawing->generateFiles($this->spreadSheet);
-            $richDataCount = count($richDataFiles);
+            $richDataCount = count($richDataDrawing->getDrawings());
 
             // Add all Rich Data files to ZIP
             foreach ($richDataFiles as $path => $content) {

src/PhpSpreadsheet/Writer/Xlsx/RichDataDrawing.php

@@ -51,6 +51,14 @@ class RichDataDrawing
         ];
     }
 
+    /**
+     * @return Drawing[]
+     */
+    public function getDrawings(): array
+    {
+        return $this->drawings;
+    }
+
     private function writeRdrichvalueXML(): string
     {
         $xml = new XMLWriter(XMLWriter::STORAGE_MEMORY);