Correct comment typo: recont_uvoffset has extra t

Also delete an extra space.

Change-Id: I8a6b36e36fb9b04d8f0ad9e0461f5a927fe40467

av1/encoder/firstpass.c

diff --git a/av1/encoder/firstpass.c b/av1/encoder/firstpass.c
index 07a9d3b..1e75ce3 100644
--- a/av1/encoder/firstpass.c
+++ b/av1/encoder/firstpass.c
@@ -683,10 +683,10 @@
 //   golden_frame: the frame buffer of the golden frame.
 //   unit_row: row index in the unit of first pass block size.
 //   unit_col: column index in the unit of first pass block size.
-//   recon_yoffset: the y offset of the reconstructed  frame buffer,
+//   recon_yoffset: the y offset of the reconstructed frame buffer,
 //                  indicating the starting point of the current block.
-//   recont_uvoffset: the u/v offset of the reconstructed frame buffer,
-//                    indicating the starting point of the current block.
+//   recon_uvoffset: the u/v offset of the reconstructed frame buffer,
+//                   indicating the starting point of the current block.
 //   src_yoffset: the y offset of the source frame buffer.
 //   fp_block_size: first pass block size.
 //   this_intra_error: the intra prediction error of this block.