Fix or cast integer conversions in cmake

These were revealed by GCC's -Wconversion option.  Fix types where it is
easy to do so.  Cast in cases we know the integer will not be truncated.

1 files changed, 3 insertions, 3 deletions

diff --git a/Source/cmSystemTools.cxx b/Source/cmSystemTools.cxx
index 5f7cfa3..5be53c2 100644
--- a/Source/cmSystemTools.cxx
+++ b/Source/cmSystemTools.cxx
@@ -1204,6 +1204,7 @@ bool cmSystemTools::ComputeFileMD5(const char* source, char* md5out)
   // Should be efficient enough on most system:
   const int bufferSize = 4096;
   char buffer[bufferSize];
+  unsigned char const* buffer_uc = reinterpret_cast<unsigned char const*>(buffer);
   // This copy loop is very sensitive on certain platforms with
   // slightly broken stream libraries (like HPUX).  Normally, it is
   // incorrect to not check the error condition on the fin.read()
@@ -1212,10 +1213,9 @@ bool cmSystemTools::ComputeFileMD5(const char* source, char* md5out)
   while(fin)
     {
     fin.read(buffer, bufferSize);
-    if(fin.gcount())
+    if(int gcount = static_cast<int>(fin.gcount()))
       {
-      cmsysMD5_Append(md5, reinterpret_cast<unsigned char const*>(buffer), 
-                      fin.gcount());
+      cmsysMD5_Append(md5, buffer_uc, gcount);
       }
     }
   cmsysMD5_FinalizeHex(md5, md5out);