ExternalProject: Avoid infinite loop on file download hash mismatch
When the loop was added by commit v3.0.0-rc1~103^2~3 (ExternalProject:
Reattempt download when verification fails, 2015-01-15), we forgot to
actually increment the loop counter. Add the increment line.
diff --git a/Modules/ExternalProject.cmake b/Modules/ExternalProject.cmake
index 17cb866..a1c7629 100644
--- a/Modules/ExternalProject.cmake
+++ b/Modules/ExternalProject.cmake
@@ -607,6 +607,7 @@
file(REMOVE \"\${file}\")
execute_process(COMMAND \${CMAKE_COMMAND} -P \"${download_script}\")
endif()
+ math(EXPR attempt \"\${attempt} + 1\")
endwhile()
if(\${succeeded})
