Fix duplicate symbol tvinterlace

Author: sago007

code/renderer_oa/tr_bloom.c

@@ -141,7 +141,7 @@ int		leifxmode;
 int		leifxpass;
 int		fakeit = 0;
 
-int 	tvinterlace = 1;
+extern int 	tvinterlace;
 int 	tvinter= 1;
 extern int tvWidth;
 extern int tvHeight;

code/sdl/sdl_glimp.c

@@ -52,7 +52,7 @@ static QGLContext opengl_context;
 int tvMode;	// leilei - tvmode
 int tvWidth;
 int tvHeight;
-int tvinterlace;	// leilei - interlace value for height
+int tvinterlace = 1;	// leilei - interlace value for height
 float tvAspectW;	// leilei - for aspect correction
 
 //int vresWidth;