Forgot this in one of previous commits

Idea here is to be able to have all files opened in IDE
and not confuse it by the same function implemented in
multiple files.

extern/libmv/libmv-capi.cc

@@ -24,6 +24,8 @@
  * ***** END GPL LICENSE BLOCK *****
  */
 
+#ifdef WITH_LIBMV
+
 /* define this to generate PNG images with content of search areas
    tracking between which failed */
 #undef DUMP_FAILURE
@@ -965,3 +967,5 @@ void libmv_InvertCameraIntrinsics(libmv_cameraIntrinsicsOptions *libmv_camera_in
 		camera_intrinsics.InvertIntrinsics(x, y, x1, y1);
 	}
 }
+
+#endif