fix some minor warnings

This was SVN commit r834.

source/ps/Interact.cpp

@@ -401,7 +401,7 @@ void CSelectedEntities::contextOrder( bool pushQueue )
 	// the number of units in the group.
 
 	float radius = 2.0f * sqrt( (float)m_selected.size() ); // A decent enough approximation
-	float _t, _x, _y;
+	float _x, _y;
 
 	for( it = m_selected.begin(); it < m_selected.end(); it++ )
 		if( (*it)->acceptsOrder( m_contextOrder, g_Mouseover.m_target ) )

source/simulation/Simulation.cpp

@@ -44,9 +44,9 @@ void CSimulation::Interpolate(double frameTime, double offset)
 {
 	const std::vector<CUnit*>& units=m_pWorld->GetUnitManager()->GetUnits();
 	for (uint i=0;i<units.size();++i)
-		units[i]->GetModel()->Update(frameTime);
+		units[i]->GetModel()->Update((float)frameTime);
 
-	g_EntityManager.interpolateAll(offset);
+	g_EntityManager.interpolateAll((float)offset);
 }
 
 void CSimulation::Simulate()

source/sound/CMusicPlayer.cpp

@@ -65,7 +65,7 @@ int VorbisSeek(void *datasource, ogg_int64_t offset, int fromWhere)
 			actualOffset = (offset);
 		else
 			actualOffset = spaceToEOF;	
-		vorbisData->dataRead += actualOffset;
+		vorbisData->dataRead += (size_t)actualOffset;
 		break;
 	case SEEK_END: 
 		vorbisData->dataRead = vorbisData->dataSize+1;
@@ -88,7 +88,7 @@ long VorbisTell(void *datasource)
 	SOggFile* vorbisData;
 	vorbisData = (SOggFile*)datasource;
 
-	return vorbisData->dataRead;
+	return (long)vorbisData->dataRead;
 }
 
 
@@ -290,13 +290,13 @@ bool CMusicPlayer::update()
 void CMusicPlayer::check()
 {
 	int error = alGetError();
-
+/*
 	if(error != AL_NO_ERROR)
 	{
-		std::cout << "OpenAL error " << error << std::endl;
+		std::cout << "OpenAL error " << error << errorString(error) << std::endl;
 		exit(1);
 	}
-
+*/
 }
 
 void CMusicPlayer::empty()

source/sound/CMusicPlayer.h

@@ -16,8 +16,8 @@
 struct SOggFile
 {
 	char *dataPtr;
-	int dataSize;
-	int dataRead;
+	size_t dataSize;
+	size_t dataRead;
 };
 
 class CMusicPlayer