Profiler - "Expected order" workaround

So the profiler apparently expects starts and ends to be consistent in
ordering. Whenever the order changes, it will likely crash. Modified the
main loop so it doesn't add the debug output's timings if the profiler
has been reset due to reloading as a workaround. This needs to be fixed,
though.

m-tool.cc

@@ -175,14 +175,23 @@ void T_Main::makeUI( )
 void T_Main::render( )
 {
 	if ( demo ) {
-		demo->render( );
+		const bool hadReset = demo->render( );
+		if ( hadReset ) {
+			UI::Profiler( ).clear( );
+			UI::Profiler( ).startFrame( );
+			UI::Profiler( ).start( "Full frame" );
+		}
 
-		UI::Profiler( ).start( "Debug" );
+		if ( !hadReset ) {
+			UI::Profiler( ).start( "Debug" );
+		}
 		T_Rendertarget::MainOutput( );
 		if ( UI::ODbg( ).isActive( ) ) {
 			UI::ODbg( ).debugOutput( );
 		}
-		UI::Profiler( ).end( "Debug" );
+		if ( !hadReset ) {
+			UI::Profiler( ).end( "Debug" );
+		}
 
 	} else {
 		T_Rendertarget::MainOutput( );

ui-demo.cc

@@ -23,12 +23,14 @@ bool T_Demo::initialise(
 	return program && runInit( *program );
 }
 
-void T_Demo::render( )
+bool T_Demo::render( )
 {
+	bool rv = false;
 	if ( Common::Ops( ).hasNewProgram( ) ) {
 		auto nProgram{ Common::Ops( ).program( ) };
 		if ( runInit( *nProgram ) ) {
 			program = std::move( nProgram );
+			rv = true;
 		}
 	}
 
@@ -44,6 +46,7 @@ void T_Demo::render( )
 			context->aborted = true;
 		}
 	}
+	return rv;
 }
 
 bool T_Demo::runInit(

ui-demo.hh

@@ -16,7 +16,7 @@ struct T_Demo
 
 	bool initialise( const uint32_t width ,
 			const uint32_t height );
-	void render( );
+	bool render( );
 
 	// ---------------------------------------------------------------------
 

ui-profiling.cc

@@ -94,6 +94,7 @@ void T_Profiler::start(
 		parents_.add( Invalid );
 	}
 
+	assert( previous_ == Invalid || previous_ < pos );
 	chain_[ pos ] = previous_;
 	if ( current_ != Invalid ) {
 		parents_[ pos ] = current_;