undo = default; constructors, they allow zero initialization, unlike constructors with empty body

contrib/bobtoolz/DPlane.h

@@ -50,7 +50,8 @@ public:
 	vec_t DistanceToPoint( const vec3_t pnt ) const;
 
 	DPlane( const vec3_t va, const vec3_t vb, const vec3_t vc, const _QERFaceData* texData );
-	DPlane() = default;
+	DPlane(){
+	}
 
 	bool m_bChkOk;
 	_QERFaceData texInfo;

libs/generic/vector.h

@@ -8,7 +8,8 @@ class BasicVector2
 {
 	Element m_elements[2];
 public:
-	BasicVector2() = default;
+	BasicVector2(){
+	}
 	template<typename OtherElement>
 	BasicVector2( const BasicVector2<OtherElement>& other ){
 		x() = static_cast<Element>( other.x() );
@@ -54,7 +55,8 @@ class BasicVector3
 	Element m_elements[3];
 public:
 
-	BasicVector3() = default;
+	BasicVector3(){
+	}
 	template<typename OtherElement>
 	BasicVector3( const BasicVector3<OtherElement>& other ){
 		x() = static_cast<Element>( other.x() );
@@ -124,7 +126,8 @@ class BasicVector4
 	Element m_elements[4];
 public:
 
-	BasicVector4() = default;
+	BasicVector4(){
+	}
 	BasicVector4( Element x_, Element y_, Element z_, Element w_ ){
 		x() = x_;
 		y() = y_;

libs/math/matrix.h

@@ -38,7 +38,8 @@ class Matrix4
 {
 	float m_elements[16];
 public:
-	Matrix4() = default;
+	Matrix4(){
+	}
 	Matrix4( float xx_, float xy_, float xz_, float xw_,
 	         float yx_, float yy_, float yz_, float yw_,
 	         float zx_, float zy_, float zz_, float zw_,

libs/math/plane.h

@@ -32,7 +32,8 @@ class Plane3___
 public:
 	T a, b, c, d;
 
-	Plane3___() = default;
+	Plane3___(){
+	}
 	Plane3___( double _a, double _b, double _c, double _d )
 		: a( _a ), b( _b ), c( _c ), d( _d ){
 	}

libs/render.h

@@ -277,7 +277,8 @@ struct Colour4b
 {
 	unsigned char r, g, b, a;
 
-	Colour4b() = default;
+	Colour4b(){
+	}
 
 	Colour4b( unsigned char _r, unsigned char _g, unsigned char _b, unsigned char _a )
 		: r( _r ), g( _g ), b( _b ), a( _a ){

libs/transformlib.h

@@ -79,7 +79,8 @@ struct Skew
 	std::size_t index;
 	float amount;
 
-	Skew() = default;
+	Skew(){
+	}
 	Skew( std::size_t index_, float amount_ ) : index( index_ ), amount( amount_ ){
 	}
 	bool operator!= ( const Skew& other ) const {

radiant/brush.h

@@ -271,7 +271,8 @@ typedef ReferencePair<FaceShaderObserver> FaceShaderObserverPair;
 class ContentsFlagsValue
 {
 public:
-	ContentsFlagsValue() = default;
+	ContentsFlagsValue(){
+	}
 	ContentsFlagsValue( int surfaceFlags, int contentFlags, int value, bool specified ) :
 		m_surfaceFlags( surfaceFlags ),
 		m_contentFlags( contentFlags ),

tools/quake3/common/polylib.h

@@ -59,7 +59,8 @@ class ESide
 {
 	bool m_value;
 public:
-	ESide() = default;
+	ESide(){
+	}
 	ESide( bool value ) : m_value( value ){}
 	operator bool() const {
 		return m_value;

tools/quake3/q3map2/q3map2.h

@@ -386,7 +386,8 @@ struct image_t
 	int width, height;
 	byte *pixels = nullptr;
 
-	image_t() = default;
+	image_t(){
+	}
 	image_t( const char *name, const char *filename, int width, int height, byte *pixels ) :
 		name( name ),
 		filename( filename ),
@@ -720,7 +721,7 @@ struct brush_t
 	int lightmapSampleSize;                 /* jal : entity based _lightmapsamplesize */
 	float lightmapScale;
 	float shadeAngleDegrees;                /* jal : entity based _shadeangle */
-	Vector3 ambientColor;
+	Vector3 ambientColor{ 0 };
 	MinMax eMinmax;
 	indexMap_t          *im;