Fix build

nyalldawson · nyalldawson · commit 0fbca6fe0af6 · 2017-08-25T06:28:07.000+10:00
diff --git a/src/providers/grass/qgis.r.in.cpp b/src/providers/grass/qgis.r.in.cpp
@@ -18,7 +18,7 @@ extern "C"
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
-#include <cmath>
+#include <math.h>
 #ifdef WIN32
 #include <fcntl.h>
 #include <io.h>
diff --git a/src/providers/grass/qgis.v.in.cpp b/src/providers/grass/qgis.v.in.cpp
@@ -18,7 +18,7 @@ extern "C"
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
-#include <cmath>
+#include <math.h>
 #include <assert.h>
 #ifdef WIN32
 #include <fcntl.h>
