fix argv accessed out of bounds in ParseCommandLineFlags() (google#321)

Author: NiklasRosenstein

src/benchmark.cc

@@ -634,7 +634,7 @@ void ParseCommandLineFlags(int* argc, char** argv) {
         // TODO: Remove this.
         ParseStringFlag(argv[i], "color_print", &FLAGS_benchmark_color) ||
         ParseInt32Flag(argv[i], "v", &FLAGS_v)) {
-      for (int j = i; j != *argc; ++j) argv[j] = argv[j + 1];
+      for (int j = i; j != *argc - 1; ++j) argv[j] = argv[j + 1];
 
       --(*argc);
       --i;