SuperBuild: if there is no args to patch, use -ut

SuperBuild/CMake/patch.cmake

@@ -7,19 +7,23 @@ endif()
 separate_arguments(DOT_DIFF_FILES)
 list(SORT DOT_DIFF_FILES)
 
+if(NOT PATCH_ARGS)
+  set(PATCH_ARGS "-ut")
+endif()
+
 foreach(dot_diff_file ${DOT_DIFF_FILES})
   message("Input patch file: ${dot_diff_file}")
   execute_process(
     COMMAND
-    ${CMAKE_COMMAND} -E chdir ${SOURCE_DIR} 
-    ${PATCH_PROGRAM} "-p1" "-i" "${dot_diff_file}" "${PATCH_ARGS}"
+    ${CMAKE_COMMAND} -E chdir ${SOURCE_DIR}
+    ${PATCH_PROGRAM} "${PATCH_ARGS}" "-p1" "-i" "${dot_diff_file}"
     RESULT_VARIABLE patch_rv
     OUTPUT_VARIABLE patch_ov
     OUTPUT_STRIP_TRAILING_WHITESPACE
     ERROR_STRIP_TRAILING_WHITESPACE)
-  
+
   set(PATCHING_FAILED FALSE)
-  
+
   if(NOT "${patch_rv}" STREQUAL "0")
     if( NOT "${patch_ov}" MATCHES "previously applied")
       set(PATCHING_FAILED TRUE)
@@ -29,14 +33,13 @@ foreach(dot_diff_file ${DOT_DIFF_FILES})
   if( "${patch_ov}" MATCHES "FAILED")
     set(PATCHING_FAILED TRUE)
   endif()
-  
+
   if(PATCHING_FAILED)
     message(FATAL_ERROR "${PATCH_PROGRAM} returned non-zero exit status \n ${patch_ov} \n")
   else()
-    message("${patch_ov}")      
+    message("${patch_ov}")
   endif()
-  
+
   unset(patch_rv)
   unset(patch_ov)
 endforeach()
-