Avoid SIGFPE on semi-ELF files, like guile cache (*.go).
--- rpm-5.4.17/rpmdb/legacy.c.orig	2019-02-14 18:13:07.961620012 +0100
+++ rpm-5.4.17/rpmdb/legacy.c	2019-02-14 19:54:24.235368679 +0100
@@ -116,7 +116,7 @@
 	if (shdr.sh_type != SHT_DYNAMIC)
 	    continue;
 	while (!bingo && (data = elf_getdata (scn, data)) != NULL) {
-	    unsigned maxndx = (unsigned) (data->d_size / shdr.sh_entsize);
+	    unsigned maxndx = (shdr.sh_entsize == 0) ? 0 : (unsigned) (data->d_size / shdr.sh_entsize);
 	    unsigned ndx;
 
             for (ndx = 0; ndx < maxndx; ++ndx) {
--- rpm-5.4.17/lib/rpmds.c.orig	2019-02-14 21:51:17.514041154 +0100
+++ rpm-5.4.17/lib/rpmds.c	2019-02-14 21:51:20.570691261 +0100
@@ -2933,6 +2933,11 @@
  * @param isX32		is this an X32 symbol?
  */
 #if defined(HAVE_GELF_H) && defined(HAVE_LIBELF) && !defined(__FreeBSD__)
+static int getShdrEntries(GElf_Shdr *shdr)
+{
+    return shdr->sh_entsize == 0 ? 0 : ((int)(shdr->sh_size / shdr->sh_entsize));
+}
+
 static char * sonameDep(/*@returned@*/ char * t, const char * s, int isElf64, int isX32)
 	/*@modifies t @*/
 {
@@ -3195,7 +3200,7 @@
 	case SHT_DYNAMIC:
 	    data = NULL;
 	    while ((data = elf_getdata (scn, data)) != NULL) {
-		for (cnt = 0; cnt < (int)(shdr->sh_size / shdr->sh_entsize); ++cnt) {
+		for (cnt = 0; cnt < getShdrEntries(shdr); ++cnt) {
 		    dyn = gelf_getdyn (data, cnt, &dyn_mem);
 		    if (dyn == NULL)
 			/*@innerbreak@*/ break;
@@ -3436,7 +3441,7 @@
 	case SHT_DYNAMIC:
 	    data = NULL;
 	    while ((data = elf_getdata (scn, data)) != NULL) {
-		for (cnt = 0; cnt < (int)(shdr->sh_size / shdr->sh_entsize); ++cnt) {
+		for (cnt = 0; cnt < getShdrEntries(shdr); ++cnt) {
 		    dyn = gelf_getdyn (data, cnt, &dyn_mem);
 		    if (dyn == NULL)
 			/*@innerbreak@*/ break;