patch 8.2.0345: compiler warning when building without the float feature

Problem:    Compiler warning when building without the float feature.
Solution:   Add #ifdef. (John Marriott)

src/evalfunc.c

@@ -280,11 +280,13 @@ ret_number(int argcount UNUSED, type_T **argtypes UNUSED)
 {
     return &t_number;
 }
+#ifdef FEAT_FLOAT
     static type_T *
 ret_float(int argcount UNUSED, type_T **argtypes UNUSED)
 {
     return &t_float;
 }
+#endif
     static type_T *
 ret_string(int argcount UNUSED, type_T **argtypes UNUSED)
 {

src/version.c

@@ -738,6 +738,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    345,
 /**/
     344,
 /**/