fix strict aliasing issues

Patch by Przemysław Iskra (#3805)

code/client/cl_cgame.c

@@ -400,11 +400,9 @@ void CL_ShutdownCGame( void ) {
 }
 
 static int	FloatAsInt( float f ) {
-	int		temp;
-
-	*(float *)&temp = f;
-
-	return temp;
+	floatint_t fi;
+	fi.f = f;
+	return fi.i;
 }
 
 /*

code/client/cl_ui.c

@@ -691,11 +691,9 @@ FloatAsInt
 ====================
 */
 static int FloatAsInt( float f ) {
-	int		temp;
-
-	*(float *)&temp = f;
-
-	return temp;
+	floatint_t fi;
+	fi.f = f;
+	return fi.i;
 }
 
 /*