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-rw-r--r--Source/cmSystemTools.cxx5
1 files changed, 3 insertions, 2 deletions
diff --git a/Source/cmSystemTools.cxx b/Source/cmSystemTools.cxx
index 12a63b0..aa39c39 100644
--- a/Source/cmSystemTools.cxx
+++ b/Source/cmSystemTools.cxx
@@ -406,11 +406,12 @@ bool cmSystemTools::IsNOTFOUND(const char* val)
bool cmSystemTools::IsOff(const char* val)
{
- if (!val || strlen(val) == 0)
+ if (!val || !*val)
{
return true;
}
- std::basic_string<char> v = val;
+ size_t len = val ? strlen(val) : 0;
+ std::basic_string<char> v(val, len);
for(std::basic_string<char>::iterator c = v.begin();
c != v.end(); c++)