Improved exceptions

Many exceptions got an improvement due to changed class or description or details it is providing.
Is not complete, needs to be done in patches in the regions, where it is needed, since some are just
swallowed.

Removed total usage of pure RuntimeExceptions to 0.

src/main/java/appeng/client/render/BaseBlockRender.java

@@ -325,9 +325,6 @@ public class BaseBlockRender
 
 	public void renderInvBlock( EnumSet<ForgeDirection> sides, AEBaseBlock block, ItemStack item, Tessellator tess, int color, RenderBlocks renderer )
 	{
-		if( Platform.isDrawing( tess ) )
-			tess.draw();
-
 		int meta = 0;
 		if( block != null && block.hasSubtypes() && item != null )
 			meta = item.getItemDamage();

src/main/java/appeng/client/render/BusRenderHelper.java

@@ -472,7 +472,7 @@ public final class BusRenderHelper implements IPartRenderHelper
 			return block;
 		}
 
-		throw new MissingDefinition( "Tried to access the multi part block." );
+		throw new MissingDefinition( "Tried to access the multi part block without it being defined." );
 	}
 
 	public void prepareBounds( RenderBlocks renderer )

src/main/java/appeng/client/render/TESRWrapper.java

@@ -33,7 +33,6 @@ import cpw.mods.fml.relauncher.SideOnly;
 import appeng.block.AEBaseBlock;
 import appeng.core.AELog;
 import appeng.tile.AEBaseTile;
-import appeng.util.Platform;
 
 
 @SideOnly( Side.CLIENT )
@@ -65,9 +64,6 @@ public class TESRWrapper extends TileEntitySpecialRenderer
 
 				Tessellator tess = Tessellator.instance;
 
-				if( Platform.isDrawing( tess ) )
-					return;
-
 				try
 				{
 					GL11.glPushMatrix();
@@ -76,9 +72,6 @@ public class TESRWrapper extends TileEntitySpecialRenderer
 					this.renderBlocksInstance.blockAccess = te.getWorldObj();
 					this.blkRender.renderTile( (AEBaseBlock) b, (AEBaseTile) te, tess, x, y, z, f, this.renderBlocksInstance );
 
-					if( Platform.isDrawing( tess ) )
-						throw new RuntimeException( "Error during rendering." );
-
 					GL11.glPopAttrib();
 					GL11.glPopMatrix();
 				}
@@ -87,7 +80,7 @@ public class TESRWrapper extends TileEntitySpecialRenderer
 					AELog.severe( "Hi, Looks like there was a crash while rendering something..." );
 					t.printStackTrace();
 					AELog.severe( "MC will now crash ( probably )!" );
-					throw new RuntimeException( t );
+					throw new IllegalStateException( t );
 				}
 			}
 		}

src/main/java/appeng/client/render/blocks/RenderBlockCraftingCPUMonitor.java

@@ -53,9 +53,6 @@ public class RenderBlockCraftingCPUMonitor extends RenderBlockCraftingCPU
 	@Override
 	public void renderTile( AEBaseBlock block, AEBaseTile tile, Tessellator tess, double x, double y, double z, float f, RenderBlocks renderer )
 	{
-		if( Platform.isDrawing( tess ) )
-			return;
-
 		if( tile instanceof TileCraftingMonitorTile )
 		{
 			TileCraftingMonitorTile cmt = (TileCraftingMonitorTile) tile;