in the attempt to fix 627393, changed IFX_FileRead's readBlock to return the length it reads

core/fxge/android/fpf_skiafontmgr.cpp

Index: core/fxge/android/fpf_skiafontmgr.cpp
diff --git a/core/fxge/android/fpf_skiafontmgr.cpp b/core/fxge/android/fpf_skiafontmgr.cpp
index b7400fc47f816e3567256677f00072c4a86857cb..da61983b1bce47641f4636c16fadd423cd5045ac 100644
--- a/core/fxge/android/fpf_skiafontmgr.cpp
+++ b/core/fxge/android/fpf_skiafontmgr.cpp
@@ -30,7 +30,9 @@ static unsigned long FPF_SkiaStream_Read(FXFT_Stream stream,
     return 0;
   }
   if (count > 0) {
-    if (!pFileRead->ReadBlock(buffer, (FX_FILESIZE)offset, (size_t)count)) {
+    if (pFileRead->ReadBlock(buffer, (FX_FILESIZE)offset, (size_t)count) !=
+            static_cast<size_t>(count) &&
+        !pFileRead->IsEOF()) {
       return 0;
     }
   }