mesa: replace >= with > when testing if we've exceeded max local params

Now a program that uses 256 locals works as it should.
diff --git a/src/mesa/shader/arbprogparse.c b/src/mesa/shader/arbprogparse.c
index a4d0fc3..6ef09fd 100644
--- a/src/mesa/shader/arbprogparse.c
+++ b/src/mesa/shader/arbprogparse.c
@@ -1929,10 +1929,10 @@
 
    /* Make sure we haven't blown past our parameter limits */
    if (((Program->Base.Target == GL_VERTEX_PROGRAM_ARB) &&
-        (Program->Base.NumParameters >=
+        (Program->Base.NumParameters >
          ctx->Const.VertexProgram.MaxLocalParams))
        || ((Program->Base.Target == GL_FRAGMENT_PROGRAM_ARB)
-           && (Program->Base.NumParameters >=
+           && (Program->Base.NumParameters >
                ctx->Const.FragmentProgram.MaxLocalParams))) {
       program_error(ctx, Program->Position, "Too many parameter variables");
       return 1;