[Typo3] Where to edit code that displays default content image object?

[Jay Hung]

Hello, I'm fairly new at editing/customizing the internal code of typo3, 
and am trying to resolve a problem when displaying a default image 
content object.  Currently, typo3 currently spits out a couple of lines 
of code displaying a spacer gif, such as the following: <img 
src="clear.gif" width="362" height="1" alt="" />

It writes that spacer gif above and below the actual display of the 
image.  Because of where I am trying to display this image, these 
1px-height spacers cause my template layout to get out of whack, and I'm 
trying to find where the code is that writes this spacer so I can remove it.

I've gone digging through quite a few php files but am not really sure 
if I'm looking at the right files or not.

Any help with this matter is appreciated.