use COPY_CLEAN_4V macro to replace using both ASSIGN_4V & COPY_SZ_4V

src/mesa/tnl/t_save_api.c

    for (i = _TNL_ATTRIB_POS+1 ; i <= _TNL_ATTRIB_INDEX ; i++) {
       if (tnl->save.attrsz[i]) {
 	 tnl->save.currentsz[i][0] = tnl->save.attrsz[i];
-	 ASSIGN_4V(tnl->save.current[i], 0, 0, 0, 1);
-	 COPY_SZ_4V(tnl->save.current[i], 
+	 COPY_CLEAN_4V(tnl->save.current[i], 
 		    tnl->save.attrsz[i], 
 		    tnl->save.attrptr[i]);
       }
 	    if (tnl->save.attrsz[j]) {
 	       if (j == attr) {
 		  if (oldsz) {
-		     ASSIGN_4V( dest, 0, 0, 0, 1 );
-		     COPY_SZ_4V( dest, oldsz, data );
+		     COPY_CLEAN_4V( dest, oldsz, data );
 		     data += oldsz;
 		     dest += newsz;
 		  }

src/mesa/tnl/t_save_playback.c

 
    for (i = _TNL_ATTRIB_POS+1 ; i <= _TNL_ATTRIB_INDEX ; i++) {
       if (node->attrsz[i]) {
-	 ASSIGN_4V(tnl->vtx.current[i], 0, 0, 0, 1);
-	 COPY_SZ_4V(tnl->vtx.current[i], node->attrsz[i], data);
+	 COPY_CLEAN_4V(tnl->vtx.current[i], node->attrsz[i], data);
 	 data += node->attrsz[i];
       }
    }

src/mesa/tnl/t_vb_program.c

 	    const GLuint size = VB->AttribPtr[attr]->size;
 	    const GLuint stride = VB->AttribPtr[attr]->stride;
 	    const GLfloat *data = (GLfloat *) (ptr + stride * i);
-	    ASSIGN_4V(ctx->VertexProgram.Inputs[attr], 0, 0, 0, 1);
-	    COPY_SZ_4V(ctx->VertexProgram.Inputs[attr], size, data);
+	    COPY_CLEAN_4V(ctx->VertexProgram.Inputs[attr], size, data);
 	 }
       }
 

src/mesa/tnl/t_vtx_api.c

          /* Note: the tnl->vtx.current[i] pointers points to
           * the ctx->Current fields.  The first 16 or so, anyway.
           */
-	 ASSIGN_4V( tnl->vtx.current[i], 0, 0, 0, 1 );
-	 COPY_SZ_4V(tnl->vtx.current[i], 
+	 COPY_CLEAN_4V(tnl->vtx.current[i], 
 		    tnl->vtx.attrsz[i], 
 		    tnl->vtx.attrptr[i]);
       }
 	    if (tnl->vtx.attrsz[j]) {
 	       if (j == attr) {
 		  if (oldsz) {
-		     ASSIGN_4V( dest, 0, 0, 0, 1 );
-		     COPY_SZ_4V( dest, oldsz, data );
+		     COPY_CLEAN_4V( dest, oldsz, data );
 		     data += oldsz;
 		     dest += newsz;
 		  } else {