MSVC 2013 compatibility: work around bug with move-only types in vector.

The std::vector implementation somehow wants to copy the data even if
the type is move-only.

src/Magnum/Text/AbstractFontConverter.cpp

@@ -40,8 +40,9 @@ AbstractFontConverter::AbstractFontConverter() = default;
 AbstractFontConverter::AbstractFontConverter(PluginManager::AbstractManager& manager, std::string plugin): PluginManager::AbstractPlugin(manager, std::move(plugin)) {}
 
 std::vector<std::pair<std::string, Containers::Array<unsigned char>>> AbstractFontConverter::exportFontToData(AbstractFont& font, GlyphCache& cache, const std::string& filename, const std::string& characters) const {
+    /* MSVC 2013 complains about deleted Array copy constructor if {} is used */
     CORRADE_ASSERT(features() >= (Feature::ExportFont|Feature::ConvertData),
-        "Text::AbstractFontConverter::exportFontToData(): feature not supported", {});
+        "Text::AbstractFontConverter::exportFontToData(): feature not supported", (std::vector<std::pair<std::string, Containers::Array<unsigned char>>>{}));
 
     return doExportFontToData(font, cache, filename, uniqueUnicode(characters));
 }
@@ -52,8 +53,9 @@ std::vector<std::pair<std::string, Containers::Array<unsigned char>>> AbstractFo
 std::vector<std::pair<std::string, Containers::Array<unsigned char>>> AbstractFontConverter::doExportFontToData(AbstractFont& font, GlyphCache& cache, const std::string& filename, const std::vector<char32_t>& characters) const
 #endif
 {
+    /* MSVC 2013 complains about deleted Array copy constructor if {} is used */
     CORRADE_ASSERT(!(features() & Feature::MultiFile),
-        "Text::AbstractFontConverter::exportFontToData(): feature advertised but not implemented", {});
+        "Text::AbstractFontConverter::exportFontToData(): feature advertised but not implemented", (std::vector<std::pair<std::string, Containers::Array<unsigned char>>>{}));
 
     std::vector<std::pair<std::string, Containers::Array<unsigned char>>> out;
     out.emplace_back(filename, std::move(doExportFontToSingleData(font, cache, characters)));
@@ -119,15 +121,17 @@ bool AbstractFontConverter::doExportFontToFile(AbstractFont& font, GlyphCache& c
 }
 
 std::vector<std::pair<std::string, Containers::Array<unsigned char>>> AbstractFontConverter::exportGlyphCacheToData(GlyphCache& cache, const std::string& filename) const {
+    /* MSVC 2013 complains about deleted Array copy constructor if {} is used */
     CORRADE_ASSERT(features() >= (Feature::ExportGlyphCache|Feature::ConvertData),
-        "Text::AbstractFontConverter::exportGlyphCacheToData(): feature not supported", {});
+        "Text::AbstractFontConverter::exportGlyphCacheToData(): feature not supported", (std::vector<std::pair<std::string, Containers::Array<unsigned char>>>{}));
 
     return doExportGlyphCacheToData(cache, filename);
 }
 
 std::vector<std::pair<std::string, Containers::Array<unsigned char>>> AbstractFontConverter::doExportGlyphCacheToData(GlyphCache& cache, const std::string& filename) const {
+    /* MSVC 2013 complains about deleted Array copy constructor if {} is used */
     CORRADE_ASSERT(!(features() & Feature::MultiFile),
-        "Text::AbstractFontConverter::exportGlyphCacheToData(): feature advertised but not implemented", {});
+        "Text::AbstractFontConverter::exportGlyphCacheToData(): feature advertised but not implemented", (std::vector<std::pair<std::string, Containers::Array<unsigned char>>>{}));
 
     std::vector<std::pair<std::string, Containers::Array<unsigned char>>> out;
     out.emplace_back(filename, std::move(doExportGlyphCacheToSingleData(cache)));