Find collada dependencies only when found static library

Author: elsid

CMakeModules/FindCOLLADA.cmake

@@ -186,8 +186,7 @@ FIND_LIBRARY(COLLADA_STATIC_LIBRARY_DEBUG
     ${ACTUAL_3DPARTY_DIR}/lib
 )
 
-    # find extra libraries that the static linking requires
-
+IF (COLLADA_STATIC_LIBRARY)
     FIND_PACKAGE(LibXml2)
     IF (LIBXML2_FOUND)
         SET(COLLADA_LIBXML_LIBRARY "${LIBXML2_LIBRARIES}" CACHE FILEPATH "" FORCE)
@@ -310,7 +309,7 @@ FIND_LIBRARY(COLLADA_STATIC_LIBRARY_DEBUG
         ${COLLADA_DOM_ROOT}/external-libs/boost/lib/mingw
         ${ACTUAL_3DPARTY_DIR}/lib
     )
-
+ENDIF()
 
 SET(COLLADA_FOUND "NO")
 IF(COLLADA_DYNAMIC_LIBRARY OR COLLADA_STATIC_LIBRARY)