Corrected the appstream file.

Author: gunterkoenigsmann

data/io.github.wxmaxima_developers.wxMaxima.appdata.xml

@@ -66,7 +66,7 @@
 	  <li> TextCells with copy-alt-text caused an crash </li>
 	  <li> A few additional small bugfixes </li>
 	  <li> Many (really many!) big stability improvements </li>
-	  <li> in sqrt(conjugate(f(x))) the horizontal lines coincided </li>
+	  <li> In sqrt(conjugate(f(x))) the horizontal lines coincided </li>
 	  <li> Strings were searched for comment starts when adding line endings </li>
 	  <li> Faster start-up by avoiding unneeded redraw events </li>
 	  <li> A big number of performance improvements </li>

src/CellPtr.h

@@ -168,7 +168,7 @@ class CellPtr
 
   template <typename U,
            typename std::enable_if<std::is_convertible<typename std::add_pointer<U>::type, pointer>::value, bool>::type = true>
-  CellPtr(const CellPtr<U> &o) : m_cb(o.m_cb->Ref()) {}
+  CellPtr(const CxellPtr<U> &o) : m_cb(o.m_cb->Ref()) {}
 
   template <typename U,
            typename std::enable_if<std::is_convertible<typename std::add_pointer<U>::type, pointer>::value, bool>::type = true>