Making AliceVision's eigen compatible with default g2o/gtsam eigen flags

alice_vision_eigen_v2_3_0.patch

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 7348387a4..2ac399239 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -354,7 +354,7 @@ find_package(Eigen3 3.3 REQUIRED)
 if(Eigen3_FOUND OR EIGEN3_FOUND)
   # message(STATUS "EIGEN_INCLUDE_DIR: ${EIGEN_INCLUDE_DIR}")
   # See https://eigen.tuxfamily.org/dox/group__TopicUnalignedArrayAssert.html
-  set(AV_EIGEN_DEFINITIONS -DEIGEN_MAX_ALIGN_BYTES=0 -DEIGEN_MAX_STATIC_ALIGN_BYTES=0)
+  #set(AV_EIGEN_DEFINITIONS -DEIGEN_MAX_ALIGN_BYTES=0 -DEIGEN_MAX_STATIC_ALIGN_BYTES=0)
 else()
   message(FATAL_ERROR " EIGEN NOT FOUND. EIGEN_INCLUDE_DIR: ${EIGEN_INCLUDE_DIR}")
 endif()
diff --git a/src/aliceVision/numeric/numeric.hpp b/src/aliceVision/numeric/numeric.hpp
index 214805ad8..f043e2e0a 100644
--- a/src/aliceVision/numeric/numeric.hpp
+++ b/src/aliceVision/numeric/numeric.hpp
@@ -11,15 +11,15 @@
 // AliceVision does not support Eigen with alignment,
 // So ensure Eigen is used with the correct flags.
 #ifndef EIGEN_MAX_ALIGN_BYTES
-#error "EIGEN_MAX_ALIGN_BYTES is not defined"
+//#error "EIGEN_MAX_ALIGN_BYTES is not defined"
 #elif EIGEN_MAX_ALIGN_BYTES != 0
-#error "EIGEN_MAX_ALIGN_BYTES is defined but not 0"
+//#error "EIGEN_MAX_ALIGN_BYTES is defined but not 0"
 #endif
 
 #ifndef EIGEN_MAX_STATIC_ALIGN_BYTES
-#error "EIGEN_MAX_STATIC_ALIGN_BYTES is not defined"
+//#error "EIGEN_MAX_STATIC_ALIGN_BYTES is not defined"
 #elif EIGEN_MAX_STATIC_ALIGN_BYTES != 0
-#error "EIGEN_MAX_STATIC_ALIGN_BYTES is defined but not 0"
+//#error "EIGEN_MAX_STATIC_ALIGN_BYTES is defined but not 0"
 #endif