small fixes

DESCRIPTION

@@ -28,7 +28,7 @@ Imports: sp
 NeedsCompilation: yes
 Packaged: 2020-05-30 09:17:28 UTC; ripley
 Author: Hiroshi Akima [aut, cph] (Fortran code (TOMS 760, 761, 697 and 433)),
-  Albrecht Gebhardt [aut, cre, cph] (R port (interp* functions, bicubic*
+  Albrecht Gebhardt [aut, cre, cph] (R port (interp*, bicubic*
     functions), bilinear code),
   Thomas Petzold [ctb, cph] (aspline function),
   Martin Maechler [ctb, cph] (interp2xyz function + enhancements),

R/interp.R

@@ -13,7 +13,7 @@ interp <-
     sp.z <- NULL
     sp.proj4string <- NULL
     if(is.null(y)&&is.character(z)){
-        if(inherits(x,"SpatialPointsDataFrame"){
+        if(inherits(x,"SpatialPointsDataFrame")){
             sp.coord <- dimnames(coordinates(x))[[2]]
             sp.z <- z
             sp.proj4string <- x@proj4string

R/interpp.R

@@ -10,14 +10,14 @@
     sp.z <- NULL
     sp.proj4string <- NULL
     if(is.null(y)&&is.character(z)){
-        if(inherits(xo,"SpatialPointsDataFrame"){
+        if(inherits(xo,"SpatialPointsDataFrame")){
             yo <- coordinates(xo)[,2]
             xo <- coordinates(xo)[,1]
         } else
             stop(paste("either x,y,z,xo,yo have to be numeric vectors",
                        "or both x and xo have to be SpatialPointsDataFrames",
                        "and z a name of a data column in x"))
-        if(inherits(x,"SpatialPointsDataFrame"){
+        if(inherits(x,"SpatialPointsDataFrame")){
             sp.coord <- dimnames(coordinates(x))[[2]]
             sp.z <- z
             sp.proj4string <- x@proj4string

configure.ac

 # package/configure.in
-AC_PREREQ([2.71])
+AC_PREREQ([2.69])
 AC_INIT([akima],[0.6-3])
 AC_CONFIG_SRCDIR(src/tripack.f)
 #if you want to use more macros