OSX build fixes

include/mitsuba/core/chisquare.h

@@ -267,7 +267,7 @@ protected:
 		const boost::function<Float (const Vector &)> &pdfFn,
 			size_t nPts, const Float *in, Float *out) {
 		#pragma omp parallel for
-		for (size_t i=0; i<nPts; ++i)
+		for (int i=0; i<(int) nPts; ++i)
 			out[i] = pdfFn(sphericalDirection(in[2*i], in[2*i+1])) * std::sin(in[2*i]);
 	}
 private:

src/phase/microflake_fiber.h

@@ -191,7 +191,7 @@ public:
 	inline GaussianFiberDistribution() {}
 
 	inline GaussianFiberDistribution(Float stddev) : m_stddev(stddev) {
-		m_normalization = 1/(std::pow(2*M_PI, 3.0f/2.0f) * m_stddev * 
+		m_normalization = 1/(std::pow(2*M_PI, (Float) 3 / (Float) 2) * m_stddev * 
 				mts_erf(1/(SQRT_TWO * m_stddev)));
 		m_c1 = 1.0f/mts_erf(1/(SQRT_TWO * m_stddev));