use float instead of double for teletone.

git-svn-id: http://svn.openzap.org/svn/openzap/trunk@227 a93c3328-9c30-0410-af19-c9cd2b2d52af

libs/openzap/src/include/libteletone_detect.h

@@ -132,7 +132,7 @@ extern "C" {
 #define DTMF_2ND_HARMONIC_COL       63.1    /* 18dB */
 #define GRID_FACTOR 4
 #define BLOCK_LEN 102
-#define M_TWO_PI 2.0*M_PI
+#define M_TWO_PI 2.0f*M_PI
 
 	/*! \brief A continer for the elements of a Goertzel Algorithm (The names are from his formula) */
 	typedef struct {