Merge branch 'develop' of https://github.com/ONLYOFFICE/core into develop

* 'develop' of https://github.com/ONLYOFFICE/core:
  .
  x2t version up

ASCOfficeOdfFile/linux/OdfFileReaderLib.pro

@@ -217,6 +217,7 @@ SOURCES += \
     ../src/odf/datatypes/tableorientation.cpp \
     ../src/odf/datatypes/tablefunction.cpp \
     ../src/odf/datatypes/tableorder.cpp \
+    ../src/odf/datatypes/dategroup.cpp \
     ../src/docx/xlsx_conditionalFormatting.cpp \
     ../src/docx/xlsx_dxfs.cpp \
     ../src/docx/docx_content_type.cpp \

ASCOfficeOdfFile/linux/odffilereaderlib_odf_datatypes.cpp

@@ -126,3 +126,4 @@
 #include "../src/odf/datatypes/tableorientation.cpp"
 #include "../src/odf/datatypes/tablefunction.cpp"
 #include "../src/odf/datatypes/tableorder.cpp"
+#include "../src/odf/datatypes/dategroup.cpp"

ASCOfficeOdfFile/src/docx/xlsx_pivots_context.cpp

@@ -827,7 +827,7 @@ int xlsx_pivots_context::end_table()
 	impl_->serialize_view(view_strm);
 	impl_->serialize_cache(cache_strm);
 
-	std::wstring & str_view = view_strm.str();
+    std::wstring str_view = view_strm.str();
 
 	if (str_view.empty()) return -1;
 
@@ -1088,4 +1088,4 @@ xlsx_pivots_context::~xlsx_pivots_context()
 
 
 }
-}
\ No newline at end of file
+}

X2tConverter/build/Qt/X2tConverter.pri

@@ -7,7 +7,7 @@
 QT       -= core
 QT       -= gui
 
-VERSION = 2.4.476.0
+VERSION = 2.4.480.0
 DEFINES += INTVER=$$VERSION
 
 TARGET = x2t