set font cache if null

core/fxge/skia/fx_skia_device.cpp

Index: core/fxge/skia/fx_skia_device.cpp
diff --git a/core/fxge/skia/fx_skia_device.cpp b/core/fxge/skia/fx_skia_device.cpp
index 222c8466e0d25bf050a448f1b35ab2312e9a3935..55fe580086ea2e3dca15b9871fe199af5a7e4a90 100644
--- a/core/fxge/skia/fx_skia_device.cpp
+++ b/core/fxge/skia/fx_skia_device.cpp
@@ -896,6 +896,8 @@ FX_BOOL CFX_SkiaDeviceDriver::DrawDeviceText(int nChars,
                                              const CFX_Matrix* pObject2Device,
                                              FX_FLOAT font_size,
                                              uint32_t color) {
+  if (!pCache)
+    pCache = CFX_GEModule::Get()->GetFontCache();
   if (m_pCache->DrawText(nChars, pCharPos, pFont, pCache, pObject2Device,
                          font_size, color, this)) {
     return TRUE;