Add long double conversion operator (#34)

src/FixedPoints/SFixed.h

@@ -74,6 +74,7 @@ public:
 	constexpr explicit operator IntegerType(void) const;
 	constexpr explicit operator float(void) const;
 	constexpr explicit operator double(void) const;
+	constexpr explicit operator long double(void) const;
 
 	template< unsigned IntegerOut, unsigned FractionOut >
 	constexpr explicit operator SFixed<IntegerOut, FractionOut>(void) const;

src/FixedPoints/SFixedMemberFunctions.h

@@ -71,7 +71,7 @@ constexpr SFixed<Integer, Fraction>::operator IntegerType(void) const
 template< unsigned Integer, unsigned Fraction >
 constexpr SFixed<Integer, Fraction>::operator float(void) const
 {
-	return (1.0f / Scale) *
+	return (1.0F / Scale) *
 	static_cast<InternalType>
 	((this->value & IdentityMask) |
 	((this->value < 0) ? ~IdentityMask : 0));
@@ -86,6 +86,15 @@ constexpr SFixed<Integer, Fraction>::operator double(void) const
 	((this->value < 0) ? ~IdentityMask : 0));
 }
 
+template< unsigned Integer, unsigned Fraction >
+constexpr SFixed<Integer, Fraction>::operator long double(void) const
+{
+	return (1.0L / Scale) *
+	static_cast<InternalType>
+	((this->value & IdentityMask) |
+	((this->value < 0) ? ~IdentityMask : 0));
+}
+
 template< unsigned Integer, unsigned Fraction >
 template< unsigned IntegerOut, unsigned FractionOut >
 constexpr SFixed<Integer, Fraction>::operator SFixed<IntegerOut, FractionOut>(void) const

src/FixedPoints/UFixed.h

@@ -74,6 +74,7 @@ public:
 	constexpr explicit operator IntegerType(void) const;
 	constexpr explicit operator float(void) const;
 	constexpr explicit operator double(void) const;
+	constexpr explicit operator long double(void) const;
 
 	template< unsigned IntegerOut, unsigned FractionOut >
 	constexpr explicit operator UFixed<IntegerOut, FractionOut>(void) const;

src/FixedPoints/UFixedMemberFunctions.h

@@ -71,7 +71,7 @@ constexpr UFixed<Integer, Fraction>::operator IntegerType(void) const
 template< unsigned Integer, unsigned Fraction >
 constexpr UFixed<Integer, Fraction>::operator float(void) const
 {
-	return ((this->value & IdentityMask) * (1.0f / Scale));
+	return ((this->value & IdentityMask) * (1.0F / Scale));
 }
 
 template< unsigned Integer, unsigned Fraction >
@@ -80,6 +80,12 @@ constexpr UFixed<Integer, Fraction>::operator double(void) const
 	return ((this->value & IdentityMask) * (1.0 / Scale));
 }
 
+template< unsigned Integer, unsigned Fraction >
+constexpr UFixed<Integer, Fraction>::operator long double(void) const
+{
+	return ((this->value & IdentityMask) * (1.0L / Scale));
+}
+
 template< unsigned Integer, unsigned Fraction >
 template< unsigned IntegerOut, unsigned FractionOut >
 constexpr UFixed<Integer, Fraction>::operator UFixed<IntegerOut, FractionOut>(void) const