r600g: remove a no-op while loop

for (;;) {

} while ();

I was surprised to see such a statement.

Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Reviewed-by: Tom Stellard <thomas.stellard@amd.com>
diff --git a/src/gallium/drivers/radeon/r600_query.c b/src/gallium/drivers/radeon/r600_query.c
index bf73a14..915d37a 100644
--- a/src/gallium/drivers/radeon/r600_query.c
+++ b/src/gallium/drivers/radeon/r600_query.c
@@ -326,7 +326,7 @@
 				/* set CONTINUE bit for all packets except the first */
 				op |= PREDICATION_CONTINUE;
 			}
-		} while (qbuf);
+		}
 	}
 }