fixed video recording issues with long demo file names

changelog.txt

@@ -100,6 +100,8 @@ chg: with r_backend GL3, depth fade with MSAA now requires GLSL 4.00 at a minimu
 
 chg: with r_backend GL3, alpha to coverage now requires GLSL 4.00 at a minimum
 
+fix: long demo file names would cause video recording to output files with no extension or outright fail
+
 fix: invalid skybox texture mip-mapping and filtering settings (e.g. cpm25 skybox seams)
 
 fix: in render batches with multiple shaders where the second or later surface had a shader using

code/client/cl_avi.cpp

@@ -42,7 +42,7 @@ typedef struct aviFileData_s
 {
   qbool         fileOpen;
   fileHandle_t  f;
-  char          fileName[ MAX_QPATH ];
+  char          fileName[ 256 + 64 ]; // extra room for the "videos/" prefix and name suffix
   int           fileSize;
   int           moviOffset;
   int           moviSize;