Fix compat implementation of ffs() to return 1-based bit numbers.

diff --git a/src/mesa/main/imports.c b/src/mesa/main/imports.c
index 3ae56c8b0b64ba66c70ec00833945f398228b43f..7d4b120099203cf9e02e70782499800b91e3dda9 100644 (file)
--- a/src/mesa/main/imports.c
+++ b/src/mesa/main/imports.c
@@ -560,6 +560,7 @@ _mesa_ffs(int i)
          bit++;
          i >>= 1;
       }
+      bit++;
    }
    return bit;
 #else