Virus Browser: Fixed gzFile usage

Signed-off-by: Mavridis Philippe <mavridisf@gmail.com>

src/dbviewer.cpp

@@ -430,11 +430,11 @@ int cli_untgz(int fd, const char *destdir)
     int nbytes, nread, nwritten, in_block = 0;
     unsigned int size;
     FILE *outfile = NULL;
-    gzFile *infile;
+    gzFile infile;
 
     printf("in cli_untgz()\n");
 
-    if((infile = (gzFile*) gzdopen(fd, "rb")) == NULL) {
+    if((infile = gzdopen(fd, "rb")) == NULL) {
     printf("Can't gzdopen() descriptor %d\n", fd);
     return -1;
     }