Fix a crash when parsing truetype fonts without any tables.

core/src/fxge/ge/fx_ge_fontmap.cpp

Index: core/src/fxge/ge/fx_ge_fontmap.cpp
diff --git a/core/src/fxge/ge/fx_ge_fontmap.cpp b/core/src/fxge/ge/fx_ge_fontmap.cpp
index 8c2751d84acd872f12cb2e61aa0e8d19ce108322..1b47f1ff14363a9b834e2fc5382e2feedf27a6e3 100644
--- a/core/src/fxge/ge/fx_ge_fontmap.cpp
+++ b/core/src/fxge/ge/fx_ge_fontmap.cpp
@@ -1428,6 +1428,9 @@ void CFX_FolderFontInfo::ReportFace(CFX_ByteString& path, FXSYS_FILE* pFile, FX_
     }
     FX_DWORD nTables = GET_TT_SHORT(buffer + 4);
     CFX_ByteString tables = _FPDF_ReadStringFromFile(pFile, nTables * 16);
+    if (tables.IsEmpty()) {
+        return;
+    }
     CFX_ByteString names = _FPDF_LoadTableFromTT(pFile, tables, nTables, 0x6e616d65);
     CFX_ByteString facename = _FPDF_GetNameFromTT(names, 1);
     CFX_ByteString style = _FPDF_GetNameFromTT(names, 2);