cmake: fix version.cmake if don't find LAST_TAG

cmake/version.cmake

@@ -58,8 +58,15 @@ function(get_patch_version)
             OUTPUT_STRIP_TRAILING_WHITESPACE
         )
 
+        if(exit_code EQUAL 0)
+            set(GET_PATCH_VERSION_CMD ${GIT_EXECUTABLE} rev-list HEAD...${LAST_TAG} --count)
+        else()
+            set(GET_PATCH_VERSION_CMD ${GIT_EXECUTABLE} rev-list HEAD --count)
+        endif()
+
+
         execute_process(COMMAND
-            "${GIT_EXECUTABLE}" rev-list HEAD...${LAST_TAG} --count
+            ${GET_PATCH_VERSION_CMD}
             WORKING_DIRECTORY "${WORK_DIR}"
             OUTPUT_VARIABLE NUMBER_PATCH
             RESULT_VARIABLE exit_code
@@ -87,6 +94,8 @@ if(Git_FOUND)
 
 else()
 
+    message(WARNING "Git not found, it is impossible to get the hash and patch version (they will be set to zero)")
+
     if(${DAEMON_PATCH_VERSION} STREQUAL patch)
         set(DAEMON_PATCH_VERSION 0)
     endif()