tr_shader: do not load heatHaze map when heatHaze is disabled

Author: illwieckz

src/engine/renderer/tr_shader.cpp

@@ -2649,6 +2649,13 @@ static bool ParseStage( shaderStage_t *stage, const char **text )
 			}
 			else if ( !Q_stricmp( token, "heathazeMap" ) )
 			{
+				// Do not load heatHaze maps when r_heatHaze is disabled.
+				if ( !r_heatHaze->integer )
+				{
+					stage->active = false;
+					return true;
+				}
+
 				stage->type = stageType_t::ST_HEATHAZEMAP;
 				SetNormalFormat( stage, dxNormalFormat );
 			}
@@ -5181,7 +5188,6 @@ static void FinishStages()
 		switch ( stage->type )
 		{
 			case stageType_t::ST_HEATHAZEMAP:
-				stage->active = r_heatHaze->integer;
 				stage->stateBits &= ~( GLS_ATEST_BITS | GLS_DEPTHMASK_TRUE );
 				break;