TOOLS: Fix memory corruption in extract_cine tool

When reading an uncompressed VOL.CNF file, it was not correctly
getting the size of the file, and as a result not enough memory was
allocated to read the file (8 bytes instead of the file size). This caused
writes to occur outside of the allocated memory.

NEWS

@@ -5,6 +5,8 @@ For a more comprehensive changelog of the latest experimental code, see:
  - Fix handling of output path for the compress_touche tool.
  - Fix handling of input path for the extract_cine tool. It was only working
    when run from the directory that contains the game data.
+ - Fix memory corruption that could cause random errors during extraction when
+   using the extract_cine tool.
 
 1.9.0 (2016-10-27)
  - Fix random crashes in the tool to convert Broken Sword 1 speech files.

engines/cine/extract_cine.cpp

@@ -260,7 +260,7 @@ void ExtractCine::unpackAllResourceFiles(const Common::Filename &filename) {
 			unpackedSize = f.readUint32BE();
 			packedSize = f.readUint32BE();
 		} else {
-			unpackedSize = packedSize = f.pos(); /* Get file size */
+			unpackedSize = packedSize = f.size(); /* Get file size */
 			f.seek(0, SEEK_SET);
 		}
 	}