Clean up hardcoded hex version slightly

CMakeLists.txt

@@ -42,6 +42,7 @@ set(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake/Modules")
 ################ PROJECT VERSION ####################
 set(PROJECT_VERSION_FULL "0.1.8-dev1")
 set(PROJECT_SO_VERSION 6)
+set(HEX_VERSION_OVERRIDE "0x108") # For CMake < 3.13
 
 # Remove the dash and anything following, to get the #.#.# version for project()
 STRING(REGEX REPLACE "\-.*$" "" VERSION_NUM "${PROJECT_VERSION_FULL}")
@@ -57,7 +58,7 @@ PROJECT(libopenshot-audio LANGUAGES C CXX VERSION ${VERSION_NUM})
 
 # JuceHeader.h needs a hexadecimal version number for the project
 if(CMAKE_VERSION VERSION_LESS 3.13)
-	set(PROJECT_VERSION_HEX "0x108") # Ugly hardcoding
+	set(PROJECT_VERSION_HEX ${HEX_VERSION_OVERRIDE}) # Ugly hardcoding
 else()
 	math(EXPR PROJECT_VERSION_HEX 
 		"(${PROJECT_VERSION_MAJOR} << 16) + \