compile error with avifile-0.7-0.7.38

I downloaded avifile-0.7-0.7.38 from http://avifile.sourceforge.net/
After ./configure and gmake I got this error:

gcc -DHAVE_CONFIG_H -I. -I. -I../../include -DHAVE_AV_CONFIG_H 
-I./../libavcodec -I./.. -Wall -Wno-unused -I../../include -O2 
-mcpu=i686 -march=i686 -ffast-math -fomit-frame-pointer 
-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE -pipe -c 
flvenc.c  -fPIC -DPIC -o flvenc.lo
flvenc.c: In function `flv_write_trailer':
flvenc.c:232: parse error before `file_size'
flvenc.c:234: `flags' undeclared (first use in this function)
flvenc.c:234: (Each undeclared identifier is reported only once
flvenc.c:234: for each function it appears in.)
flvenc.c:238: `file_size' undeclared (first use in this function)
gmake[2]: *** [flvenc.lo] Error 1

it seems that the 'int64_t file_size' should be declared before the call 
to  Dump(flv,pb,1); !

I am running Linux (Red Hat 7.2) (Linux 2.4.20-20.7) with gcc 2.96

The ./configure said:
Install path:	  /usr/local
Qt:		  yes
Sdl:		  yes
Xft:		  yes
Oss audio:	  yes
Sun audio:	  no
Mga_vid:	  no
Plugins:
   ac3passthrough  yes  (with SBLive only)
   divx4 (dec/enc) no/no (DivxNetworks)
   xvid		  no   (DivX4, XviD)
   ffmpeg	  yes  (DivX ;-), OpenDivX, MJPEG, AC3)
   ffmpeg faad     no  (AAC) (runtime yes)
   os motion jpeg  yes  (MJPEG)
   win32 	  yes  (DivX, WMF1/2, DV, MJPEG, Ati, Asus,...)
   MAD		  yes  (MPEG Layer I/II/III)
   vorbis	  yes
   lame runtime	

Did I do something wrong ? (I did check the FAQ)
regards
Pierre Willard