eliminate some MSVC warnings

Signed-off-by: Steven Noonan <steven@uplinklabs.net>

Author: tycho

clock.c

@@ -409,15 +409,15 @@ void cpu_clock_calibrate(void)
     minc = ~0ULL;
     maxc = samples = avg = 0;
     for (i = 0; i < NR_TIME_ITERS; i++) {
-        double this = cycles[i];
+        double this = (double)(cycles[i]);
 
         minc = min(cycles[i], minc);
         maxc = max(cycles[i], maxc);
 
         if ((fmax(this, mean) - fmin(this, mean)) > S)
             continue;
         samples++;
-        avg += this;
+        avg += cycles[i];
     }
 
     S /= (double) NR_TIME_ITERS;

main.c

@@ -320,7 +320,7 @@ static void clock_compare(const struct clockspec self, const struct clockspec ot
     /*
      * Clamp to either 30 or 200.
      */
-    samples = fmax(30.0, 1e6 / observed_res);
+    samples = (uint32_t)fmax(30.0, 1e6 / observed_res);
     if (samples > 200)
         samples = 200;
     else if (samples > 30)
@@ -685,7 +685,7 @@ int main(int argc, char **argv)
 
             printf("%-22s %s\n",
                     clock_name(*p),
-                    pretty_print(buf, sizeof(buf), res, rate_suffixes, 10));
+                    pretty_print(buf, sizeof(buf), (double)res, rate_suffixes, 10));
         }
         printf("\n\n");