tdf#92346 - Copy functionality in the viewer

Reference class added to
desktop/source/lib/lokandroid.cxx
for Java_org_libreoffice_kit_Document_getTextSelection()

Change-Id: I211d5709df39fd9fafdab9232af760613f6b86c0
Reviewed-on: https://gerrit.libreoffice.org/29804Reviewed-by: jan iversen <jani@documentfoundation.org>
Tested-by: jan iversen <jani@documentfoundation.org>

desktop/source/lib/lokandroid.cxx

@@ -321,7 +321,8 @@ extern "C" SAL_JNI_EXPORT jstring JNICALL Java_org_libreoffice_kit_Document_getT
     const char* pMimeType = pEnv->GetStringUTFChars(mimeType, NULL);
 
     char* pUsedMimeType = 0;
-    char* pSelection = pDocument->pClass->getTextSelection(pDocument, pMimeType, &pUsedMimeType);
+    LibreOfficeKitClass* pcls = pDocument->pClass;
+    char* pSelection = pcls->getTextSelection(pDocument, pMimeType, &pUsedMimeType);
     free(pUsedMimeType);
 
     pEnv->ReleaseStringUTFChars(mimeType, pMimeType);