Don't generate depth shader for heat haze

Regression in 8e9a33f
Fixes #1710.

Author: slipher

src/engine/renderer/tr_shade.cpp

@@ -1403,17 +1403,13 @@ void Render_portal( shaderStage_t *pStage )
 
 void Render_heatHaze( shaderStage_t *pStage )
 {
-	uint32_t      stateBits;
 	float         deformMagnitude;
 
 	GLIMP_LOGCOMMENT( "--- Render_heatHaze ---" );
 
-	// remove alpha test
-	stateBits = pStage->stateBits;
-	stateBits &= ~GLS_ATEST_BITS;
-	stateBits &= ~GLS_DEPTHMASK_TRUE;
+	ASSERT( !( pStage->stateBits & GLS_DEPTHMASK_TRUE ) );
 
-	GL_State( stateBits );
+	GL_State( pStage->stateBits );
 
 	// choose right shader program ----------------------------------
 	ProcessShaderHeatHaze( pStage );

src/engine/renderer/tr_shader.cpp

@@ -5148,6 +5148,7 @@ static void FinishStages()
 		{
 			case stageType_t::ST_HEATHAZEMAP:
 				stage->active = r_heatHaze->integer;
+				stage->stateBits &= ~( GLS_ATEST_BITS | GLS_DEPTHMASK_TRUE );
 				break;
 
 			case stageType_t::ST_LIQUIDMAP: