Fix clang static analyzer warnings.

system/extras/cpustats/cpustats.c:127:61: warning: Assigned value is
garbage or undefined [clang-analyzer-core.uninitialized.Assign]

system/extras/cpustats/cpustats.c:116:29: warning: Call to 'malloc' has
an allocation size of 0 bytes [clang-analyzer-unix.API]

Test: Warning no longer appears
Change-Id: I770bf73421608c890ecb1c1c538970e358a69199
1 file changed