Check empty TRAVIS_TAG

CMakeLists.txt

@@ -12,10 +12,9 @@ set(CMAKE_MODULE_PATH "${CMAKE_MODULE_PATH};${CMAKE_SOURCE_DIR}/cmake/modules")
 
 # Determine package version.
 find_package (Git QUIET)
-if (DEFINED ENV{TRAVIS_TAG})
+if (DEFINED ENV{TRAVIS_TAG} AND NOT "$ENV{TRAVIS_TAG}" STREQUAL "")
 	set (STLINK_PACKAGE_VERSION "$ENV{TRAVIS_TAG}")
 elseif (GIT_FOUND AND EXISTS "${PROJECT_SOURCE_DIR}/.git")
-	message("Found git, using git tags for version")
 	# Working off a git repo, using git versioning
 
 	# Check if HEAD is pointing to a tag