get rid of piForeach

apply some code analyzer recommendations
ICU flag now check if libicu exists
prepare for more accurate growth of containers (limited PoT, then constantly increase size)

CMakeLists.txt

@@ -286,9 +286,14 @@ endif()
 # Check if ICU used for PIString and PIChar
 set(PIP_ICU "no")
 if(ICU)
-	set(PIP_ICU "yes")
-	add_definitions(-DPIP_ICU)
-	list(APPEND LIBS_MAIN icuuc)
+	pip_find_lib(icuuc)
+	if (icuuc_FOUND)
+		set(PIP_ICU "yes")
+		add_definitions(-DPIP_ICU)
+		list(APPEND LIBS_MAIN icuuc)
+	else()
+		message(STATUS "Warning: ICU requested, but not found. Build without ICU")
+	endif()
 endif()
 
 
@@ -707,6 +712,7 @@ macro(expand_to_length _out _str _len)
 endmacro()
 
 list(REMOVE_ITEM LIBS_STATUS ${PIP_MODULES})
+list(REMOVE_DUPLICATES LIBS_STATUS)
 message("----------PIP----------")
 message(" Version: ${PIP_VERSION} ")
 message(" Linkage: ${PIP_LIB_TYPE_MSG}")