Bugfix in Version.cmake

Replacing the value of LifeV_MAJOR_MINOR_VERSIION from
030800 to 30800 to avoid it being interpreted as an octal value.
This CMake variable is only used in Config_config.h.in

Version.cmake

@@ -32,7 +32,7 @@ SET(LifeV_VERSION 3.8.0)
 SET(LifeV_MAJOR_VERSION 3)
 SET(LifeV_MINOR_VERSION 8)
 SET(LifeV_MICRO_VERSION 0)
-SET(LifeV_MAJOR_MINOR_VERSION 030800)
+SET(LifeV_MAJOR_MINOR_VERSION 30800)
 SET(LifeV_VERSION_STRING "3.8.0")
 SET(LifeV_ENABLE_DEVELOPMENT_MODE_DEFAULT ON) # Change to 'OFF' for a release