fix unidemponetial behaviour with PIP version

CMakeLists.txt

@@ -54,7 +54,7 @@ include(PIPMacros)
 include(SHSTKMacros)
 
 shstk_begin_project(PIP)
-set(PIP_VERSION_BUILD "${PIP_VERSION}" CACHE STRING "")
+set(PIP_VERSION "${PIP_VERSION}" CACHE STRING "")
 
 set(_ICU_DEFAULT OFF)
 if((NOT DEFINED WIN32) AND (NOT DEFINED ANDROID_PLATFORM) AND (NOT DEFINED APPLE))

cmake/FindPIP.cmake

@@ -34,7 +34,6 @@ if (BUILDING_PIP)
 	set(PIP_LIBRARY pip CACHE STRING "")
 	
 	set(PIP_FOUND ON CACHE BOOL "")
-	set(PIP_VERSION "${PIP_VERSION_BUILD}" CACHE STRING "")
 else()
 	find_library(PIP_LIBRARY pip HINTS ${PIP_LIBDIR})
 	foreach (_l ${__libs})