cmCallVisualStudioMacro: fix a shadowing warning
cmVisualStudio10TargetGenerator: fix a narrowing warning

0xAA literals are integers which doesn't fit into a char array. C++11
says this is an error and VS2015 now warns about it.
Merge topic 'fix-vs2015-warnings' into next

b138be07 cmVisualStudio10TargetGenerator: fix a narrowing warning
8d379cd7 cmCallVisualStudioMacro: fix a shadowing warning