use accurate wording for comment

gpu-simulator/main.cc

@@ -82,7 +82,7 @@ int main(int argc, const char **argv) {
   unsigned i = 0;
   while (i < commandlist.size() || !kernels_info.empty()) {
     //gulp up as many commands as possible - either cpu_gpu_mem_copy 
-    //or kernel_launch - until the vector "kernels_info" has exceeded
+    //or kernel_launch - until the vector "kernels_info" has reached
     //the window_size or we have read every command from commandlist
     while (kernels_info.size() < window_size && i < commandlist.size()) {
       trace_kernel_info_t *kernel_info = NULL;