util: Add missing break statement in u_caps.c

Thanks Vinson.

src/gallium/auxiliary/util/u_caps.c

@@ -73,6 +73,7 @@ util_check_caps_out(struct pipe_screen *screen, const unsigned *list, int *out)
             *out = i - 2;
             return FALSE;
          }
+         break;
       case UTIL_CAPS_CHECK_UNIMPLEMENTED:
          *out = i - 1;
          return FALSE;