Fix typos and compiler warnings (see comments to 2b3afd95a23f).

src/common/math.cpp

@@ -4,9 +4,9 @@
 
 namespace
 {
-	// The Box–Muller transform generates two random numbers, one of which we cache here.
+	// The Box–Muller transform generates two random numbers, one of which we
-	// A value +infinity is used to signal the cache is invalid and that new numbers have
+	// cache here. A value of +infinity is used to signal the cache is invalid
-	// to be generated.
+	// and that new numbers have to be generated.
 	float last_randnormal = std::numeric_limits<float>::infinity();
 }
 
@@ -25,7 +25,7 @@ float random_normal(float o)
 
 	// else: generate numbers using the Box-Muller transform
 	float a = sqrt(-2.0f * log(random()));
-	float b = LOVE_M_PI * 2.0f * random();
+	float b = float(LOVE_M_PI) * 2.0f * random();
 	last_randnormal = a * cos(b);
 	return a * sin(b) * o;
 }

src/common/math.h

@@ -87,7 +87,8 @@ inline float next_p2(float x)
  */
 inline float random()
 {
-	return float(rand()) / (float(RAND_MAX) + 1.0f);
+	// to satisfy picky compilers...
+	return float(double(rand() % RAND_MAX) / double(RAND_MAX));
 }
 
 /**
@@ -114,7 +115,7 @@ inline float random(float min, float max)
  * @returns Normal distributed random number with mean 0 and variance o^2.
  */
 float random_normal(float o = 1.);
-#define random_gaussion random_normal
+#define random_gaussian random_normal
 
 } // love