fix read past parameter boundary in difflPDF_mod

cran-comments.md

@@ -1,14 +1,16 @@
+Fixes .Rd and STRICT_R_HEADERS issues.
+
 # Test environments
 * ubuntu 22.04 (devel) 
 * Windows Server 2019 (release) 
 * CRAN win builder (devel)
-* CRAN mac builder (devel)
-* macOS Catalina 10.15 (devel, release)
+* macOS 14.6 (devel, release)
 
 ## Check status summary
-                  WARNING NOTE OK
-  Source packages       0    0  1
-  Reverse depends       1    4 10
 
-* Warning unrelated to this package.
+                 NOTE OK
+  Source packages    0  1
+  Reverse depends    5 11
+
+* Notes unrelated to this package.
 

src/logderiv.c

@@ -313,8 +313,8 @@ void difflPDF_mod(double* u, double* v, int* n, double* param, int* copula, doub
   double* nparam = (double *) malloc(2*sizeof(double));
 
   int ncopula;
-  nparam[0]= -param[0];
-  nparam[1]= -param[1];
+  nparam[0]= -param[0]; 
+  nparam[1]=0; // only implemented for one parameter families
   int i;
 
 
@@ -324,6 +324,7 @@ void difflPDF_mod(double* u, double* v, int* n, double* param, int* copula, doub
       for (i = 0; i < *n; ++i) {negu[i] = 1 - u[i];}
 	  difflPDF(negu, v, n, nparam, &ncopula, out);
 	  for(i=0;i<*n;i++){out[i]=-out[i];}
+
     }
   else if(((*copula==33) | (*copula==34) | (*copula==36) | (*copula==37) | (*copula==38) | (*copula==39) | (*copula==40)))	// 270? rotated copulas
     {