Simplify InsetMathGrid structs

src/mathed/InsetMathGrid.cpp

@@ -78,41 +78,15 @@ static void resetGrid(InsetMathGrid & grid)
 }
 
 
-
 //////////////////////////////////////////////////////////////
 
 
-InsetMathGrid::CellInfo::CellInfo()
-	: multi(CELL_NORMAL)
-{}
-
-
-
-//////////////////////////////////////////////////////////////
-
-
-InsetMathGrid::RowInfo::RowInfo()
-	: descent(0), ascent(0), lines(0), skip(0),
-	  allow_newpage(true)
-{}
-
-
-
 int InsetMathGrid::RowInfo::skipPixels(MetricsInfo const & mi) const
 {
 	return mi.base.inPixels(crskip);
 }
 
 
-
-//////////////////////////////////////////////////////////////
-
-
-InsetMathGrid::ColInfo::ColInfo()
-	: align('c'), width(0), offset(0), lines(0), skip(0)
-{}
-
-
 //////////////////////////////////////////////////////////////
 
 

src/mathed/InsetMathGrid.h

@@ -39,54 +39,45 @@ public:
 	};
 
 	/// additional per-cell information
-	class CellInfo {
-	public:
-		///
-		CellInfo();
+	struct CellInfo {
 		/// multicolumn flag
-		Multicolumn multi;
+		Multicolumn multi = CELL_NORMAL;
 		/// special multi columns alignment
 		docstring align;
 	};
 
 	/// additional per-row information
-	class RowInfo {
-	public:
-		///
-		RowInfo();
+	struct RowInfo {
 		///
 		int skipPixels(MetricsInfo const & mi) const;
 		/// cached descent
-		mutable int descent;
+		mutable int descent = 0;
 		/// cached ascent
-		mutable int ascent;
+		mutable int ascent = 0;
 		/// cached offset for each bufferview
 		mutable std::map<BufferView const *, int> offset;
 		/// how many hlines above this row?
-		unsigned int lines;
+		unsigned int lines = 0;
 		/// parameter to the line break
 		Length crskip;
 		/// extra distance between lines
-		int skip;
+		int skip = 0;
 		/// Is a page break allowed after this row?
-		bool allow_newpage;
+		bool allow_newpage = true;
 	};
 
 	// additional per-row information
-	class ColInfo {
-	public:
-		///
-		ColInfo();
+	struct ColInfo {
 		/// currently possible: 'l', 'c', 'r'
-		char align;
+		char align = 'c';
 		/// cached width
-		mutable int width;
+		mutable int width = 0;
 		/// cached offset
-		mutable int offset;
+		mutable int offset = 0;
 		/// how many lines to the left of this column?
-		unsigned int lines;
+		unsigned int lines = 0;
 		/// additional amount to the right to be skipped when drawing
-		int skip;
+		int skip = 0;
 		/// Special alignment.
 		/// This does also contain align_ and lines_ if it is nonempty.
 		/// It needs to be in sync with align_ and lines_ because some