Compilation fixes for Visual Studio 2013

Author: unknown

example/mapcode.cpp

@@ -570,7 +570,7 @@ int main(const int argc, const char** argv)
 
         int gridX = 0;
         int gridY = 0;
-        int line = my_round(sqrt(totalNrOfPoints));
+        int line = my_round(sqrt((float) totalNrOfPoints));
         for (int i = 0; i < totalNrOfPoints; ++i) {
             double lat;
             double lon;

mapcodelib/mapcoder.c

@@ -2341,7 +2341,7 @@ int interpret_coord( const unsigned char *i, int islat, double *result )
   #define skipnum(i) {while (isdig(*i)) i++;}
   #define skipfp(i) {skipnum(i); if (*i=='.') {i++;skipnum(i);}}
 
-  const char *winds = islat ? "nsNS+- " : "ewEW+- ";
+  char *winds = islat ? "nsNS+- " : "ewEW+- ";
 
   // skip white spaces, signs and appropriate wind direction letters
   char *p;