Print UMF's own error message when needed.

mlprec/impl/mld_dumf_interface.c

@@ -106,6 +106,7 @@ int mld_dumf_fact(int n, int nnz,
     info = 0;
   } else {
     printf("umfpack_di_symbolic() error returns INFO= %d\n", info);
+    umfpack_di_report_status(Control,info);
     *symptr = (void *) NULL; 
     *numptr = (void *) NULL; 
     return -11;
@@ -127,6 +128,7 @@ int mld_dumf_fact(int n, int nnz,
 
   } else {
     printf("umfpack_di_numeric() error returns INFO= %d\n", info);
+    umfpack_di_report_status(Control,info);
     info = -12;
     *numptr =  NULL; 
   }

mlprec/impl/mld_zumf_interface.c

@@ -107,6 +107,7 @@ int mld_zumf_fact(int n, int nnz,
     info = 0;
   } else {
     printf("umfpack_zi_symbolic() error returns INFO= %d\n", info);
+    umfpack_zi_report_status(Control,info);
     *symptr = (void *) NULL; 
     *numptr = (void *) NULL; 
     return -11;
@@ -128,6 +129,7 @@ int mld_zumf_fact(int n, int nnz,
 
   } else {
     printf("umfpack_zi_numeric() error returns INFO= %d\n", info);
+    umfpack_zi_report_status(Control,info);
     info = -12;
     *numptr =  NULL; 
   }