Cleanup for GCC-4.x
diff --git a/board/w7o/fpga.c b/board/w7o/fpga.c
index 336bfba..100bce4 100644
--- a/board/w7o/fpga.c
+++ b/board/w7o/fpga.c
@@ -252,7 +252,7 @@
     xcv_len = len - 14 - fn_len;		/* fpga image length */
 
     /* Check for uninitialized FLASH */
-    if ((strncmp(buf, "w7o", 3)!=0) || (len > 0x0007ffffL) || (len == 0))
+    if ((strncmp((char *)buf, "w7o", 3)!=0) || (len > 0x0007ffffL) || (len == 0))
 	goto bad_image;
 
     /*