patch 8.2.5152: search() gets stuck with "c" and skip evaluates to true

Problem:    search() gets stuck with "c" and skip evaluates to true.
Solution:   Reset the SEARCH_START option. (closes #10608)

src/evalfunc.c

@@ -8543,6 +8543,9 @@ search_cmn(typval_T *argvars, pos_T *match_pos, int *flagsp)
 	    if (!do_skip)
 		break;
 	}
+
+	// clear the start flag to avoid getting stuck here
+	options &= ~SEARCH_START;
     }
 
     if (subpatnum != FAIL)